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Finding the Fourth Proportional to 715,595.34, 987,540.42 and 393,314.04

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Solution

The fourth proportional to 715,595.34, 987,540.42 and 393,314.04 is: 542,783.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,595.34 : 987,540.42 = 393,314.04 : x
  2. Step 2: Convert to fraction form
    715,595.34/987,540.42 = 393,314.04/x
  3. Step 3: Cross multiply
    715,595.34x = 987,540.42 × 393,314.04
  4. Step 4: Simplify right side
    715,595.34x = 388,413,512,253.50
  5. Step 5: Solve for x
    x = 388,413,512,253.50/715,595.34
  6. Step 6: Final answer
    x = 542,783.74

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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.