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Finding the Fourth Proportional to 715,393.48, 987,185.22 and 413,606.92

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Solution

The fourth proportional to 715,393.48, 987,185.22 and 413,606.92 is: 570,744.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,393.48 : 987,185.22 = 413,606.92 : x
  2. Step 2: Convert to fraction form
    715,393.48/987,185.22 = 413,606.92/x
  3. Step 3: Cross multiply
    715,393.48x = 987,185.22 × 413,606.92
  4. Step 4: Simplify right side
    715,393.48x = 408,306,638,313.72
  5. Step 5: Solve for x
    x = 408,306,638,313.72/715,393.48
  6. Step 6: Final answer
    x = 570,744.14

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Double scale
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Similar ratio
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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.