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Finding the Fourth Proportional to 342,479.80, 513,719.70 and 155,491.30

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Solution

The fourth proportional to 342,479.80, 513,719.70 and 155,491.30 is: 233,236.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,479.80 : 513,719.70 = 155,491.30 : x
  2. Step 2: Convert to fraction form
    342,479.80/513,719.70 = 155,491.30/x
  3. Step 3: Cross multiply
    342,479.80x = 513,719.70 × 155,491.30
  4. Step 4: Simplify right side
    342,479.80x = 79,878,943,988.61
  5. Step 5: Solve for x
    x = 79,878,943,988.61/342,479.80
  6. Step 6: Final answer
    x = 233,236.95

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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.