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Finding the Fourth Proportional to 342,470.40, 513,475.20 and 155,385.60

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Solution

The fourth proportional to 342,470.40, 513,475.20 and 155,385.60 is: 232,973.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,470.40 : 513,475.20 = 155,385.60 : x
  2. Step 2: Convert to fraction form
    342,470.40/513,475.20 = 155,385.60/x
  3. Step 3: Cross multiply
    342,470.40x = 513,475.20 × 155,385.60
  4. Step 4: Simplify right side
    342,470.40x = 79,786,652,037.12
  5. Step 5: Solve for x
    x = 79,786,652,037.12/342,470.40
  6. Step 6: Final answer
    x = 232,973.86

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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.