Home / 280,538.27-387,145.29-159,687.34

Finding the Fourth Proportional to 280,538.27, 387,145.29 and 159,687.34

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Solution

The fourth proportional to 280,538.27, 387,145.29 and 159,687.34 is: 220,369.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,538.27 : 387,145.29 = 159,687.34 : x
  2. Step 2: Convert to fraction form
    280,538.27/387,145.29 = 159,687.34/x
  3. Step 3: Cross multiply
    280,538.27x = 387,145.29 × 159,687.34
  4. Step 4: Simplify right side
    280,538.27x = 61,822,199,405.09
  5. Step 5: Solve for x
    x = 61,822,199,405.09/280,538.27
  6. Step 6: Final answer
    x = 220,369.93

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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.