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Finding the Fourth Proportional to 253,615.52, 349,986.90 and 137,328.40

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Solution

The fourth proportional to 253,615.52, 349,986.90 and 137,328.40 is: 189,511.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,615.52 : 349,986.90 = 137,328.40 : x
  2. Step 2: Convert to fraction form
    253,615.52/349,986.90 = 137,328.40/x
  3. Step 3: Cross multiply
    253,615.52x = 349,986.90 × 137,328.40
  4. Step 4: Simplify right side
    253,615.52x = 48,063,140,997.96
  5. Step 5: Solve for x
    x = 48,063,140,997.96/253,615.52
  6. Step 6: Final answer
    x = 189,511.83

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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.