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Finding the Fourth Proportional to 280,479.08, 387,061.08 and 153,154.78

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Solution

The fourth proportional to 280,479.08, 387,061.08 and 153,154.78 is: 211,353.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,479.08 : 387,061.08 = 153,154.78 : x
  2. Step 2: Convert to fraction form
    280,479.08/387,061.08 = 153,154.78/x
  3. Step 3: Cross multiply
    280,479.08x = 387,061.08 × 153,154.78
  4. Step 4: Simplify right side
    280,479.08x = 59,280,254,553.96
  5. Step 5: Solve for x
    x = 59,280,254,553.96/280,479.08
  6. Step 6: Final answer
    x = 211,353.57

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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.