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Finding the Fourth Proportional to 715,394.48, 987,186.60 and 413,607.92

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Solution

The fourth proportional to 715,394.48, 987,186.60 and 413,607.92 is: 570,745.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,394.48 : 987,186.60 = 413,607.92 : x
  2. Step 2: Convert to fraction form
    715,394.48/987,186.60 = 413,607.92/x
  3. Step 3: Cross multiply
    715,394.48x = 987,186.60 × 413,607.92
  4. Step 4: Simplify right side
    715,394.48x = 408,308,196,277.87
  5. Step 5: Solve for x
    x = 408,308,196,277.87/715,394.48
  6. Step 6: Final answer
    x = 570,745.52

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1.5x scale

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.