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Finding the Fourth Proportional to 624,470.61, 861,790.30 and 382,706.47

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Solution

The fourth proportional to 624,470.61, 861,790.30 and 382,706.47 is: 528,147.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,470.61 : 861,790.30 = 382,706.47 : x
  2. Step 2: Convert to fraction form
    624,470.61/861,790.30 = 382,706.47/x
  3. Step 3: Cross multiply
    624,470.61x = 861,790.30 × 382,706.47
  4. Step 4: Simplify right side
    624,470.61x = 329,812,720,482.00
  5. Step 5: Solve for x
    x = 329,812,720,482.00/624,470.61
  6. Step 6: Final answer
    x = 528,147.71

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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.