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Finding the Fourth Proportional to 720,693.92, 994,551.04 and 398,412.32

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Solution

The fourth proportional to 720,693.92, 994,551.04 and 398,412.32 is: 549,805.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,693.92 : 994,551.04 = 398,412.32 : x
  2. Step 2: Convert to fraction form
    720,693.92/994,551.04 = 398,412.32/x
  3. Step 3: Cross multiply
    720,693.92x = 994,551.04 × 398,412.32
  4. Step 4: Simplify right side
    720,693.92x = 396,241,387,204.81
  5. Step 5: Solve for x
    x = 396,241,387,204.81/720,693.92
  6. Step 6: Final answer
    x = 549,805.37

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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.