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Finding the Fourth Proportional to 342,635.40, 513,953.10 and 155,646.90

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Solution

The fourth proportional to 342,635.40, 513,953.10 and 155,646.90 is: 233,470.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,635.40 : 513,953.10 = 155,646.90 : x
  2. Step 2: Convert to fraction form
    342,635.40/513,953.10 = 155,646.90/x
  3. Step 3: Cross multiply
    342,635.40x = 513,953.10 × 155,646.90
  4. Step 4: Simplify right side
    342,635.40x = 79,995,206,760.39
  5. Step 5: Solve for x
    x = 79,995,206,760.39/342,635.40
  6. Step 6: Final answer
    x = 233,470.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.