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Finding the Fourth Proportional to 480,939.56, 663,909.18 and 287,415.56

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Solution

The fourth proportional to 480,939.56, 663,909.18 and 287,415.56 is: 396,760.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,939.56 : 663,909.18 = 287,415.56 : x
  2. Step 2: Convert to fraction form
    480,939.56/663,909.18 = 287,415.56/x
  3. Step 3: Cross multiply
    480,939.56x = 663,909.18 × 287,415.56
  4. Step 4: Simplify right side
    480,939.56x = 190,817,828,758.84
  5. Step 5: Solve for x
    x = 190,817,828,758.84/480,939.56
  6. Step 6: Final answer
    x = 396,760.52

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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.