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Finding the Fourth Proportional to 408,077.10, 612,115.65 and 370,679.40

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Solution

The fourth proportional to 408,077.10, 612,115.65 and 370,679.40 is: 556,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,077.10 : 612,115.65 = 370,679.40 : x
  2. Step 2: Convert to fraction form
    408,077.10/612,115.65 = 370,679.40/x
  3. Step 3: Cross multiply
    408,077.10x = 612,115.65 × 370,679.40
  4. Step 4: Simplify right side
    408,077.10x = 226,898,661,872.61
  5. Step 5: Solve for x
    x = 226,898,661,872.61/408,077.10
  6. Step 6: Final answer
    x = 556,019.10

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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.