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Finding the Fourth Proportional to 715,467.60, 987,325.20 and 393,177.60

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Solution

The fourth proportional to 715,467.60, 987,325.20 and 393,177.60 is: 542,574.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,467.60 : 987,325.20 = 393,177.60 : x
  2. Step 2: Convert to fraction form
    715,467.60/987,325.20 = 393,177.60/x
  3. Step 3: Cross multiply
    715,467.60x = 987,325.20 × 393,177.60
  4. Step 4: Simplify right side
    715,467.60x = 388,194,152,555.52
  5. Step 5: Solve for x
    x = 388,194,152,555.52/715,467.60
  6. Step 6: Final answer
    x = 542,574.05

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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.