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Finding the Fourth Proportional to 720,774.72, 994,624.92 and 398,465.46

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Solution

The fourth proportional to 720,774.72, 994,624.92 and 398,465.46 is: 549,857.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,774.72 : 994,624.92 = 398,465.46 : x
  2. Step 2: Convert to fraction form
    720,774.72/994,624.92 = 398,465.46/x
  3. Step 3: Cross multiply
    720,774.72x = 994,624.92 × 398,465.46
  4. Step 4: Simplify right side
    720,774.72x = 396,323,676,275.26
  5. Step 5: Solve for x
    x = 396,323,676,275.26/720,774.72
  6. Step 6: Final answer
    x = 549,857.90

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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.