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Finding the Fourth Proportional to 978,357.60, 1,467,521.78 and 339,126.66

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Solution

The fourth proportional to 978,357.60, 1,467,521.78 and 339,126.66 is: 508,684.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,357.60 : 1,467,521.78 = 339,126.66 : x
  2. Step 2: Convert to fraction form
    978,357.60/1,467,521.78 = 339,126.66/x
  3. Step 3: Cross multiply
    978,357.60x = 1,467,521.78 × 339,126.66
  4. Step 4: Simplify right side
    978,357.60x = 497,675,758,033.02
  5. Step 5: Solve for x
    x = 497,675,758,033.02/978,357.60
  6. Step 6: Final answer
    x = 508,684.92

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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.