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Finding the Fourth Proportional to 718,518.64, 991,549.72 and 396,242.16

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Solution

The fourth proportional to 718,518.64, 991,549.72 and 396,242.16 is: 546,810.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,518.64 : 991,549.72 = 396,242.16 : x
  2. Step 2: Convert to fraction form
    718,518.64/991,549.72 = 396,242.16/x
  3. Step 3: Cross multiply
    718,518.64x = 991,549.72 × 396,242.16
  4. Step 4: Simplify right side
    718,518.64x = 392,893,802,800.20
  5. Step 5: Solve for x
    x = 392,893,802,800.20/718,518.64
  6. Step 6: Final answer
    x = 546,810.87

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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.