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Finding the Fourth Proportional to 420,800.88, 630,967.80 and 140,165.04

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Solution

The fourth proportional to 420,800.88, 630,967.80 and 140,165.04 is: 210,169.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,800.88 : 630,967.80 = 140,165.04 : x
  2. Step 2: Convert to fraction form
    420,800.88/630,967.80 = 140,165.04/x
  3. Step 3: Cross multiply
    420,800.88x = 630,967.80 × 140,165.04
  4. Step 4: Simplify right side
    420,800.88x = 88,439,626,925.71
  5. Step 5: Solve for x
    x = 88,439,626,925.71/420,800.88
  6. Step 6: Final answer
    x = 210,169.78

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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.