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Finding the Fourth Proportional to 578,402.22, 866,473.36 and 398,455.86

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Solution

The fourth proportional to 578,402.22, 866,473.36 and 398,455.86 is: 596,905.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,402.22 : 866,473.36 = 398,455.86 : x
  2. Step 2: Convert to fraction form
    578,402.22/866,473.36 = 398,455.86/x
  3. Step 3: Cross multiply
    578,402.22x = 866,473.36 × 398,455.86
  4. Step 4: Simplify right side
    578,402.22x = 345,251,387,825.89
  5. Step 5: Solve for x
    x = 345,251,387,825.89/578,402.22
  6. Step 6: Final answer
    x = 596,905.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.