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Finding the Fourth Proportional to 718,460.91, 991,482.80 and 396,182.57

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Solution

The fourth proportional to 718,460.91, 991,482.80 and 396,182.57 is: 546,735.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,460.91 : 991,482.80 = 396,182.57 : x
  2. Step 2: Convert to fraction form
    718,460.91/991,482.80 = 396,182.57/x
  3. Step 3: Cross multiply
    718,460.91x = 991,482.80 × 396,182.57
  4. Step 4: Simplify right side
    718,460.91x = 392,808,196,876.47
  5. Step 5: Solve for x
    x = 392,808,196,876.47/718,460.91
  6. Step 6: Final answer
    x = 546,735.66

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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.