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Finding the Fourth Proportional to 479,064.90, 661,298.50 and 288,041.38

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Solution

The fourth proportional to 479,064.90, 661,298.50 and 288,041.38 is: 397,610.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,064.90 : 661,298.50 = 288,041.38 : x
  2. Step 2: Convert to fraction form
    479,064.90/661,298.50 = 288,041.38/x
  3. Step 3: Cross multiply
    479,064.90x = 661,298.50 × 288,041.38
  4. Step 4: Simplify right side
    479,064.90x = 190,481,332,531.93
  5. Step 5: Solve for x
    x = 190,481,332,531.93/479,064.90
  6. Step 6: Final answer
    x = 397,610.70

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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.