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Finding the Fourth Proportional to 307,881.90, 425,170.45 and 291,108.52

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Solution

The fourth proportional to 307,881.90, 425,170.45 and 291,108.52 is: 402,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,881.90 : 425,170.45 = 291,108.52 : x
  2. Step 2: Convert to fraction form
    307,881.90/425,170.45 = 291,108.52/x
  3. Step 3: Cross multiply
    307,881.90x = 425,170.45 × 291,108.52
  4. Step 4: Simplify right side
    307,881.90x = 123,770,740,447.23
  5. Step 5: Solve for x
    x = 123,770,740,447.23/307,881.90
  6. Step 6: Final answer
    x = 402,007.20

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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.