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Finding the Fourth Proportional to 253,618.55, 349,989.32 and 140,438.87

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Solution

The fourth proportional to 253,618.55, 349,989.32 and 140,438.87 is: 193,803.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,618.55 : 349,989.32 = 140,438.87 : x
  2. Step 2: Convert to fraction form
    253,618.55/349,989.32 = 140,438.87/x
  3. Step 3: Cross multiply
    253,618.55x = 349,989.32 × 140,438.87
  4. Step 4: Simplify right side
    253,618.55x = 49,152,104,612.87
  5. Step 5: Solve for x
    x = 49,152,104,612.87/253,618.55
  6. Step 6: Final answer
    x = 193,803.27

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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.