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Finding the Fourth Proportional to 280,507.72, 420,765.30 and 93,519.28

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Solution

The fourth proportional to 280,507.72, 420,765.30 and 93,519.28 is: 140,280.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,507.72 : 420,765.30 = 93,519.28 : x
  2. Step 2: Convert to fraction form
    280,507.72/420,765.30 = 93,519.28/x
  3. Step 3: Cross multiply
    280,507.72x = 420,765.30 × 93,519.28
  4. Step 4: Simplify right side
    280,507.72x = 39,349,667,904.98
  5. Step 5: Solve for x
    x = 39,349,667,904.98/280,507.72
  6. Step 6: Final answer
    x = 140,280.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.