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Finding the Fourth Proportional to 307,960.64, 425,279.20 and 291,188.16

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Solution

The fourth proportional to 307,960.64, 425,279.20 and 291,188.16 is: 402,117.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,960.64 : 425,279.20 = 291,188.16 : x
  2. Step 2: Convert to fraction form
    307,960.64/425,279.20 = 291,188.16/x
  3. Step 3: Cross multiply
    307,960.64x = 425,279.20 × 291,188.16
  4. Step 4: Simplify right side
    307,960.64x = 123,836,267,734.27
  5. Step 5: Solve for x
    x = 123,836,267,734.27/307,960.64
  6. Step 6: Final answer
    x = 402,117.19

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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.