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Finding the Fourth Proportional to 261,339.36, 360,604.60 and 153,930.78

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Solution

The fourth proportional to 261,339.36, 360,604.60 and 153,930.78 is: 212,398.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,339.36 : 360,604.60 = 153,930.78 : x
  2. Step 2: Convert to fraction form
    261,339.36/360,604.60 = 153,930.78/x
  3. Step 3: Cross multiply
    261,339.36x = 360,604.60 × 153,930.78
  4. Step 4: Simplify right side
    261,339.36x = 55,508,147,349.59
  5. Step 5: Solve for x
    x = 55,508,147,349.59/261,339.36
  6. Step 6: Final answer
    x = 212,398.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.