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Finding the Fourth Proportional to 715,546.28, 987,477.54 and 393,267.80

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Solution

The fourth proportional to 715,546.28, 987,477.54 and 393,267.80 is: 542,722.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,546.28 : 987,477.54 = 393,267.80 : x
  2. Step 2: Convert to fraction form
    715,546.28/987,477.54 = 393,267.80/x
  3. Step 3: Cross multiply
    715,546.28x = 987,477.54 × 393,267.80
  4. Step 4: Simplify right side
    715,546.28x = 388,343,119,705.21
  5. Step 5: Solve for x
    x = 388,343,119,705.21/715,546.28
  6. Step 6: Final answer
    x = 542,722.58

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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.