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Finding the Fourth Proportional to 307,963.64, 425,283.34 and 291,191.16

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Solution

The fourth proportional to 307,963.64, 425,283.34 and 291,191.16 is: 402,121.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,963.64 : 425,283.34 = 291,191.16 : x
  2. Step 2: Convert to fraction form
    307,963.64/425,283.34 = 291,191.16/x
  3. Step 3: Cross multiply
    307,963.64x = 425,283.34 × 291,191.16
  4. Step 4: Simplify right side
    307,963.64x = 123,838,749,103.27
  5. Step 5: Solve for x
    x = 123,838,749,103.27/307,963.64
  6. Step 6: Final answer
    x = 402,121.33

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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.