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Finding the Fourth Proportional to 425,921.60, 638,370.40 and 176,475.20

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Solution

The fourth proportional to 425,921.60, 638,370.40 and 176,475.20 is: 264,500.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,921.60 : 638,370.40 = 176,475.20 : x
  2. Step 2: Convert to fraction form
    425,921.60/638,370.40 = 176,475.20/x
  3. Step 3: Cross multiply
    425,921.60x = 638,370.40 × 176,475.20
  4. Step 4: Simplify right side
    425,921.60x = 112,656,544,014.08
  5. Step 5: Solve for x
    x = 112,656,544,014.08/425,921.60
  6. Step 6: Final answer
    x = 264,500.66

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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.