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Finding the Fourth Proportional to 420,442.43, 630,288.68 and 154,140.89

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Solution

The fourth proportional to 420,442.43, 630,288.68 and 154,140.89 is: 231,073.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,442.43 : 630,288.68 = 154,140.89 : x
  2. Step 2: Convert to fraction form
    420,442.43/630,288.68 = 154,140.89/x
  3. Step 3: Cross multiply
    420,442.43x = 630,288.68 × 154,140.89
  4. Step 4: Simplify right side
    420,442.43x = 97,153,254,169.98
  5. Step 5: Solve for x
    x = 97,153,254,169.98/420,442.43
  6. Step 6: Final answer
    x = 231,073.86

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1.5x scale

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.