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Finding the Fourth Proportional to 715,614.22, 987,534.93 and 393,324.23

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Solution

The fourth proportional to 715,614.22, 987,534.93 and 393,324.23 is: 542,780.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,614.22 : 987,534.93 = 393,324.23 : x
  2. Step 2: Convert to fraction form
    715,614.22/987,534.93 = 393,324.23/x
  3. Step 3: Cross multiply
    715,614.22x = 987,534.93 × 393,324.23
  4. Step 4: Simplify right side
    715,614.22x = 388,421,415,940.35
  5. Step 5: Solve for x
    x = 388,421,415,940.35/715,614.22
  6. Step 6: Final answer
    x = 542,780.46

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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.