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Finding the Fourth Proportional to 356,689.80, 535,210.02 and 143,449.20

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Solution

The fourth proportional to 356,689.80, 535,210.02 and 143,449.20 is: 215,244.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,689.80 : 535,210.02 = 143,449.20 : x
  2. Step 2: Convert to fraction form
    356,689.80/535,210.02 = 143,449.20/x
  3. Step 3: Cross multiply
    356,689.80x = 535,210.02 × 143,449.20
  4. Step 4: Simplify right side
    356,689.80x = 76,775,449,200.98
  5. Step 5: Solve for x
    x = 76,775,449,200.98/356,689.80
  6. Step 6: Final answer
    x = 215,244.31

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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.