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Finding the Fourth Proportional to 715,699.30, 987,253.21 and 429,052.85

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Solution

The fourth proportional to 715,699.30, 987,253.21 and 429,052.85 is: 591,846.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,699.30 : 987,253.21 = 429,052.85 : x
  2. Step 2: Convert to fraction form
    715,699.30/987,253.21 = 429,052.85/x
  3. Step 3: Cross multiply
    715,699.30x = 987,253.21 × 429,052.85
  4. Step 4: Simplify right side
    715,699.30x = 423,583,803,422.15
  5. Step 5: Solve for x
    x = 423,583,803,422.15/715,699.30
  6. Step 6: Final answer
    x = 591,846.05

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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.