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Finding the Fourth Proportional to 652,186.20, 978,279.30 and 403,354.20

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Solution

The fourth proportional to 652,186.20, 978,279.30 and 403,354.20 is: 605,031.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,186.20 : 978,279.30 = 403,354.20 : x
  2. Step 2: Convert to fraction form
    652,186.20/978,279.30 = 403,354.20/x
  3. Step 3: Cross multiply
    652,186.20x = 978,279.30 × 403,354.20
  4. Step 4: Simplify right side
    652,186.20x = 394,593,064,428.06
  5. Step 5: Solve for x
    x = 394,593,064,428.06/652,186.20
  6. Step 6: Final answer
    x = 605,031.30

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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.