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Finding the Fourth Proportional to 688,696.28, 950,127.50 and 398,254.12

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Solution

The fourth proportional to 688,696.28, 950,127.50 and 398,254.12 is: 549,432.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,696.28 : 950,127.50 = 398,254.12 : x
  2. Step 2: Convert to fraction form
    688,696.28/950,127.50 = 398,254.12/x
  3. Step 3: Cross multiply
    688,696.28x = 950,127.50 × 398,254.12
  4. Step 4: Simplify right side
    688,696.28x = 378,392,191,400.30
  5. Step 5: Solve for x
    x = 378,392,191,400.30/688,696.28
  6. Step 6: Final answer
    x = 549,432.61

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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.