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Finding the Fourth Proportional to 410,302.45, 615,392.11 and 129,783.25

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Solution

The fourth proportional to 410,302.45, 615,392.11 and 129,783.25 is: 194,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,302.45 : 615,392.11 = 129,783.25 : x
  2. Step 2: Convert to fraction form
    410,302.45/615,392.11 = 129,783.25/x
  3. Step 3: Cross multiply
    410,302.45x = 615,392.11 × 129,783.25
  4. Step 4: Simplify right side
    410,302.45x = 79,867,588,060.16
  5. Step 5: Solve for x
    x = 79,867,588,060.16/410,302.45
  6. Step 6: Final answer
    x = 194,655.40

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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.