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Finding the Fourth Proportional to 640,071.48, 883,315.95 and 382,098.12

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Solution

The fourth proportional to 640,071.48, 883,315.95 and 382,098.12 is: 527,305.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,071.48 : 883,315.95 = 382,098.12 : x
  2. Step 2: Convert to fraction form
    640,071.48/883,315.95 = 382,098.12/x
  3. Step 3: Cross multiply
    640,071.48x = 883,315.95 × 382,098.12
  4. Step 4: Simplify right side
    640,071.48x = 337,513,363,861.01
  5. Step 5: Solve for x
    x = 337,513,363,861.01/640,071.48
  6. Step 6: Final answer
    x = 527,305.74

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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.