Home / 718,466.10-991,490.16-396,187.62

Finding the Fourth Proportional to 718,466.10, 991,490.16 and 396,187.62

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Solution

The fourth proportional to 718,466.10, 991,490.16 and 396,187.62 is: 546,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,466.10 : 991,490.16 = 396,187.62 : x
  2. Step 2: Convert to fraction form
    718,466.10/991,490.16 = 396,187.62/x
  3. Step 3: Cross multiply
    718,466.10x = 991,490.16 × 396,187.62
  4. Step 4: Simplify right side
    718,466.10x = 392,816,126,743.82
  5. Step 5: Solve for x
    x = 392,816,126,743.82/718,466.10
  6. Step 6: Final answer
    x = 546,742.74

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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.