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Finding the Fourth Proportional to 840,792.51, 1,160,328.51 and 478,280.25

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Solution

The fourth proportional to 840,792.51, 1,160,328.51 and 478,280.25 is: 660,046.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,792.51 : 1,160,328.51 = 478,280.25 : x
  2. Step 2: Convert to fraction form
    840,792.51/1,160,328.51 = 478,280.25/x
  3. Step 3: Cross multiply
    840,792.51x = 1,160,328.51 × 478,280.25
  4. Step 4: Simplify right side
    840,792.51x = 554,962,209,844.93
  5. Step 5: Solve for x
    x = 554,962,209,844.93/840,792.51
  6. Step 6: Final answer
    x = 660,046.57

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.