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Finding the Fourth Proportional to 253,613.28, 349,986.78 and 137,328.06

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Solution

The fourth proportional to 253,613.28, 349,986.78 and 137,328.06 is: 189,512.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,613.28 : 349,986.78 = 137,328.06 : x
  2. Step 2: Convert to fraction form
    253,613.28/349,986.78 = 137,328.06/x
  3. Step 3: Cross multiply
    253,613.28x = 349,986.78 × 137,328.06
  4. Step 4: Simplify right side
    253,613.28x = 48,063,005,523.05
  5. Step 5: Solve for x
    x = 48,063,005,523.05/253,613.28
  6. Step 6: Final answer
    x = 189,512.97

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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.