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Finding the Fourth Proportional to 410,438.15, 615,752.06 and 129,955.40

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Solution

The fourth proportional to 410,438.15, 615,752.06 and 129,955.40 is: 194,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,438.15 : 615,752.06 = 129,955.40 : x
  2. Step 2: Convert to fraction form
    410,438.15/615,752.06 = 129,955.40/x
  3. Step 3: Cross multiply
    410,438.15x = 615,752.06 × 129,955.40
  4. Step 4: Simplify right side
    410,438.15x = 80,020,301,529.59
  5. Step 5: Solve for x
    x = 80,020,301,529.59/410,438.15
  6. Step 6: Final answer
    x = 194,963.12

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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.