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Finding the Fourth Proportional to 652,126.20, 978,189.30 and 402,948.60

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Solution

The fourth proportional to 652,126.20, 978,189.30 and 402,948.60 is: 604,422.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,126.20 : 978,189.30 = 402,948.60 : x
  2. Step 2: Convert to fraction form
    652,126.20/978,189.30 = 402,948.60/x
  3. Step 3: Cross multiply
    652,126.20x = 978,189.30 × 402,948.60
  4. Step 4: Simplify right side
    652,126.20x = 394,160,008,969.98
  5. Step 5: Solve for x
    x = 394,160,008,969.98/652,126.20
  6. Step 6: Final answer
    x = 604,422.90

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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.