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Finding the Fourth Proportional to 638,671.20, 957,952.80 and 195,439.20

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Solution

The fourth proportional to 638,671.20, 957,952.80 and 195,439.20 is: 293,142.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,671.20 : 957,952.80 = 195,439.20 : x
  2. Step 2: Convert to fraction form
    638,671.20/957,952.80 = 195,439.20/x
  3. Step 3: Cross multiply
    638,671.20x = 957,952.80 × 195,439.20
  4. Step 4: Simplify right side
    638,671.20x = 187,221,528,869.76
  5. Step 5: Solve for x
    x = 187,221,528,869.76/638,671.20
  6. Step 6: Final answer
    x = 293,142.28

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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.