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Finding the Fourth Proportional to 420,474.58, 630,711.87 and 104,931.49

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Solution

The fourth proportional to 420,474.58, 630,711.87 and 104,931.49 is: 157,397.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,474.58 : 630,711.87 = 104,931.49 : x
  2. Step 2: Convert to fraction form
    420,474.58/630,711.87 = 104,931.49/x
  3. Step 3: Cross multiply
    420,474.58x = 630,711.87 × 104,931.49
  4. Step 4: Simplify right side
    420,474.58x = 66,181,536,279.79
  5. Step 5: Solve for x
    x = 66,181,536,279.79/420,474.58
  6. Step 6: Final answer
    x = 157,397.24

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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.