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Finding the Fourth Proportional to 280,685.93, 387,369.54 and 159,865.11

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Solution

The fourth proportional to 280,685.93, 387,369.54 and 159,865.11 is: 220,626.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,685.93 : 387,369.54 = 159,865.11 : x
  2. Step 2: Convert to fraction form
    280,685.93/387,369.54 = 159,865.11/x
  3. Step 3: Cross multiply
    280,685.93x = 387,369.54 × 159,865.11
  4. Step 4: Simplify right side
    280,685.93x = 61,926,874,122.75
  5. Step 5: Solve for x
    x = 61,926,874,122.75/280,685.93
  6. Step 6: Final answer
    x = 220,626.93

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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.