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Finding the Fourth Proportional to 342,390.10, 472,512.26 and 189,425.65

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Solution

The fourth proportional to 342,390.10, 472,512.26 and 189,425.65 is: 261,415.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,390.10 : 472,512.26 = 189,425.65 : x
  2. Step 2: Convert to fraction form
    342,390.10/472,512.26 = 189,425.65/x
  3. Step 3: Cross multiply
    342,390.10x = 472,512.26 × 189,425.65
  4. Step 4: Simplify right side
    342,390.10x = 89,505,941,983.47
  5. Step 5: Solve for x
    x = 89,505,941,983.47/342,390.10
  6. Step 6: Final answer
    x = 261,415.10

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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.