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Finding the Fourth Proportional to 291,611.75, 402,424.22 and 157,475.75

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Solution

The fourth proportional to 291,611.75, 402,424.22 and 157,475.75 is: 217,316.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,611.75 : 402,424.22 = 157,475.75 : x
  2. Step 2: Convert to fraction form
    291,611.75/402,424.22 = 157,475.75/x
  3. Step 3: Cross multiply
    291,611.75x = 402,424.22 × 157,475.75
  4. Step 4: Simplify right side
    291,611.75x = 63,372,055,862.67
  5. Step 5: Solve for x
    x = 63,372,055,862.67/291,611.75
  6. Step 6: Final answer
    x = 217,316.54

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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.