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Finding the Fourth Proportional to 715,375.20, 987,303.60 and 429,052.80

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Solution

The fourth proportional to 715,375.20, 987,303.60 and 429,052.80 is: 592,144.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,375.20 : 987,303.60 = 429,052.80 : x
  2. Step 2: Convert to fraction form
    715,375.20/987,303.60 = 429,052.80/x
  3. Step 3: Cross multiply
    715,375.20x = 987,303.60 × 429,052.80
  4. Step 4: Simplify right side
    715,375.20x = 423,605,374,030.08
  5. Step 5: Solve for x
    x = 423,605,374,030.08/715,375.20
  6. Step 6: Final answer
    x = 592,144.34

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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.