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Finding the Fourth Proportional to 356,945.40, 535,442.40 and 113,767.20

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Solution

The fourth proportional to 356,945.40, 535,442.40 and 113,767.20 is: 170,658.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,945.40 : 535,442.40 = 113,767.20 : x
  2. Step 2: Convert to fraction form
    356,945.40/535,442.40 = 113,767.20/x
  3. Step 3: Cross multiply
    356,945.40x = 535,442.40 × 113,767.20
  4. Step 4: Simplify right side
    356,945.40x = 60,915,782,609.28
  5. Step 5: Solve for x
    x = 60,915,782,609.28/356,945.40
  6. Step 6: Final answer
    x = 170,658.55

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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.