Home / 280,538.17-387,145.14-159,687.23

Finding the Fourth Proportional to 280,538.17, 387,145.14 and 159,687.23

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Solution

The fourth proportional to 280,538.17, 387,145.14 and 159,687.23 is: 220,369.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,538.17 : 387,145.14 = 159,687.23 : x
  2. Step 2: Convert to fraction form
    280,538.17/387,145.14 = 159,687.23/x
  3. Step 3: Cross multiply
    280,538.17x = 387,145.14 × 159,687.23
  4. Step 4: Simplify right side
    280,538.17x = 61,822,134,657.70
  5. Step 5: Solve for x
    x = 61,822,134,657.70/280,538.17
  6. Step 6: Final answer
    x = 220,369.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.