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Finding the Fourth Proportional to 703,999.05, 971,458.61 and 398,060.43

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Solution

The fourth proportional to 703,999.05, 971,458.61 and 398,060.43 is: 549,289.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,999.05 : 971,458.61 = 398,060.43 : x
  2. Step 2: Convert to fraction form
    703,999.05/971,458.61 = 398,060.43/x
  3. Step 3: Cross multiply
    703,999.05x = 971,458.61 × 398,060.43
  4. Step 4: Simplify right side
    703,999.05x = 386,699,232,023.80
  5. Step 5: Solve for x
    x = 386,699,232,023.80/703,999.05
  6. Step 6: Final answer
    x = 549,289.42

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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.