Home / 345,989.20-519,275.40-156,740.80

Finding the Fourth Proportional to 345,989.20, 519,275.40 and 156,740.80

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Solution

The fourth proportional to 345,989.20, 519,275.40 and 156,740.80 is: 235,243.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,989.20 : 519,275.40 = 156,740.80 : x
  2. Step 2: Convert to fraction form
    345,989.20/519,275.40 = 156,740.80/x
  3. Step 3: Cross multiply
    345,989.20x = 519,275.40 × 156,740.80
  4. Step 4: Simplify right side
    345,989.20x = 81,391,641,616.32
  5. Step 5: Solve for x
    x = 81,391,641,616.32/345,989.20
  6. Step 6: Final answer
    x = 235,243.30

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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.