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Finding the Fourth Proportional to 554,480.90, 831,721.35 and 402,921.80

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Solution

The fourth proportional to 554,480.90, 831,721.35 and 402,921.80 is: 604,382.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,480.90 : 831,721.35 = 402,921.80 : x
  2. Step 2: Convert to fraction form
    554,480.90/831,721.35 = 402,921.80/x
  3. Step 3: Cross multiply
    554,480.90x = 831,721.35 × 402,921.80
  4. Step 4: Simplify right side
    554,480.90x = 335,118,663,440.43
  5. Step 5: Solve for x
    x = 335,118,663,440.43/554,480.90
  6. Step 6: Final answer
    x = 604,382.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.