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Finding the Fourth Proportional to 245,218.88, 338,391.26 and 143,253.78

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Solution

The fourth proportional to 245,218.88, 338,391.26 and 143,253.78 is: 197,683.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,218.88 : 338,391.26 = 143,253.78 : x
  2. Step 2: Convert to fraction form
    245,218.88/338,391.26 = 143,253.78/x
  3. Step 3: Cross multiply
    245,218.88x = 338,391.26 × 143,253.78
  4. Step 4: Simplify right side
    245,218.88x = 48,475,827,113.96
  5. Step 5: Solve for x
    x = 48,475,827,113.96/245,218.88
  6. Step 6: Final answer
    x = 197,683.91

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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.