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Finding the Fourth Proportional to 342,157.25, 472,135.80 and 189,174.78

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Solution

The fourth proportional to 342,157.25, 472,135.80 and 189,174.78 is: 261,038.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,157.25 : 472,135.80 = 189,174.78 : x
  2. Step 2: Convert to fraction form
    342,157.25/472,135.80 = 189,174.78/x
  3. Step 3: Cross multiply
    342,157.25x = 472,135.80 × 189,174.78
  4. Step 4: Simplify right side
    342,157.25x = 89,316,186,095.12
  5. Step 5: Solve for x
    x = 89,316,186,095.12/342,157.25
  6. Step 6: Final answer
    x = 261,038.41

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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.