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Finding the Fourth Proportional to 276,689.80, 415,034.70 and 136,430.20

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Solution

The fourth proportional to 276,689.80, 415,034.70 and 136,430.20 is: 204,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,689.80 : 415,034.70 = 136,430.20 : x
  2. Step 2: Convert to fraction form
    276,689.80/415,034.70 = 136,430.20/x
  3. Step 3: Cross multiply
    276,689.80x = 415,034.70 × 136,430.20
  4. Step 4: Simplify right side
    276,689.80x = 56,623,267,127.94
  5. Step 5: Solve for x
    x = 56,623,267,127.94/276,689.80
  6. Step 6: Final answer
    x = 204,645.30

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1.5x scale

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.