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Finding the Fourth Proportional to 978,357.78, 1,467,523.02 and 339,126.84

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Solution

The fourth proportional to 978,357.78, 1,467,523.02 and 339,126.84 is: 508,685.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,357.78 : 1,467,523.02 = 339,126.84 : x
  2. Step 2: Convert to fraction form
    978,357.78/1,467,523.02 = 339,126.84/x
  3. Step 3: Cross multiply
    978,357.78x = 1,467,523.02 × 339,126.84
  4. Step 4: Simplify right side
    978,357.78x = 497,676,444,399.86
  5. Step 5: Solve for x
    x = 497,676,444,399.86/978,357.78
  6. Step 6: Final answer
    x = 508,685.53

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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.