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Finding the Fourth Proportional to 978,591.36, 1,467,534.92 and 338,721.36

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Solution

The fourth proportional to 978,591.36, 1,467,534.92 and 338,721.36 is: 507,960.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,591.36 : 1,467,534.92 = 338,721.36 : x
  2. Step 2: Convert to fraction form
    978,591.36/1,467,534.92 = 338,721.36/x
  3. Step 3: Cross multiply
    978,591.36x = 1,467,534.92 × 338,721.36
  4. Step 4: Simplify right side
    978,591.36x = 497,085,423,949.89
  5. Step 5: Solve for x
    x = 497,085,423,949.89/978,591.36
  6. Step 6: Final answer
    x = 507,960.16

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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.