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Finding the Fourth Proportional to 402,442.20, 603,663.30 and 243,009.90

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Solution

The fourth proportional to 402,442.20, 603,663.30 and 243,009.90 is: 364,514.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,442.20 : 603,663.30 = 243,009.90 : x
  2. Step 2: Convert to fraction form
    402,442.20/603,663.30 = 243,009.90/x
  3. Step 3: Cross multiply
    402,442.20x = 603,663.30 × 243,009.90
  4. Step 4: Simplify right side
    402,442.20x = 146,696,158,166.67
  5. Step 5: Solve for x
    x = 146,696,158,166.67/402,442.20
  6. Step 6: Final answer
    x = 364,514.85

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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.