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Finding the Fourth Proportional to 715,493.62, 987,360.62 and 393,203.33

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Solution

The fourth proportional to 715,493.62, 987,360.62 and 393,203.33 is: 542,609.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,493.62 : 987,360.62 = 393,203.33 : x
  2. Step 2: Convert to fraction form
    715,493.62/987,360.62 = 393,203.33/x
  3. Step 3: Cross multiply
    715,493.62x = 987,360.62 × 393,203.33
  4. Step 4: Simplify right side
    715,493.62x = 388,233,478,758.06
  5. Step 5: Solve for x
    x = 388,233,478,758.06/715,493.62
  6. Step 6: Final answer
    x = 542,609.28

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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.