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Finding the Fourth Proportional to 478,481.61, 660,332.16 and 274,530.65

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Solution

The fourth proportional to 478,481.61, 660,332.16 and 274,530.65 is: 378,868.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,481.61 : 660,332.16 = 274,530.65 : x
  2. Step 2: Convert to fraction form
    478,481.61/660,332.16 = 274,530.65/x
  3. Step 3: Cross multiply
    478,481.61x = 660,332.16 × 274,530.65
  4. Step 4: Simplify right side
    478,481.61x = 181,281,413,799.04
  5. Step 5: Solve for x
    x = 181,281,413,799.04/478,481.61
  6. Step 6: Final answer
    x = 378,868.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.