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Finding the Fourth Proportional to 420,901.80, 630,660.15 and 243,098.70

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Solution

The fourth proportional to 420,901.80, 630,660.15 and 243,098.70 is: 364,248.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,901.80 : 630,660.15 = 243,098.70 : x
  2. Step 2: Convert to fraction form
    420,901.80/630,660.15 = 243,098.70/x
  3. Step 3: Cross multiply
    420,901.80x = 630,660.15 × 243,098.70
  4. Step 4: Simplify right side
    420,901.80x = 153,312,662,606.81
  5. Step 5: Solve for x
    x = 153,312,662,606.81/420,901.80
  6. Step 6: Final answer
    x = 364,248.06

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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.