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Finding the Fourth Proportional to 280,655.53, 387,305.01 and 159,796.87

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Solution

The fourth proportional to 280,655.53, 387,305.01 and 159,796.87 is: 220,519.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,655.53 : 387,305.01 = 159,796.87 : x
  2. Step 2: Convert to fraction form
    280,655.53/387,305.01 = 159,796.87/x
  3. Step 3: Cross multiply
    280,655.53x = 387,305.01 × 159,796.87
  4. Step 4: Simplify right side
    280,655.53x = 61,890,127,365.06
  5. Step 5: Solve for x
    x = 61,890,127,365.06/280,655.53
  6. Step 6: Final answer
    x = 220,519.89

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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.