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Finding the Fourth Proportional to 865,425.12, 1,194,280.05 and 478,266.57

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Solution

The fourth proportional to 865,425.12, 1,194,280.05 and 478,266.57 is: 660,004.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,425.12 : 1,194,280.05 = 478,266.57 : x
  2. Step 2: Convert to fraction form
    865,425.12/1,194,280.05 = 478,266.57/x
  3. Step 3: Cross multiply
    865,425.12x = 1,194,280.05 × 478,266.57
  4. Step 4: Simplify right side
    865,425.12x = 571,184,223,132.93
  5. Step 5: Solve for x
    x = 571,184,223,132.93/865,425.12
  6. Step 6: Final answer
    x = 660,004.21

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Double scale
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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.