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Finding the Fourth Proportional to 280,439.96, 387,041.10 and 159,610.64

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Solution

The fourth proportional to 280,439.96, 387,041.10 and 159,610.64 is: 220,282.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,439.96 : 387,041.10 = 159,610.64 : x
  2. Step 2: Convert to fraction form
    280,439.96/387,041.10 = 159,610.64/x
  3. Step 3: Cross multiply
    280,439.96x = 387,041.10 × 159,610.64
  4. Step 4: Simplify right side
    280,439.96x = 61,775,877,677.30
  5. Step 5: Solve for x
    x = 61,775,877,677.30/280,439.96
  6. Step 6: Final answer
    x = 220,282.01

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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.