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Finding the Fourth Proportional to 5,307.64, 7,319.10 and 3,979.24

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Solution

The fourth proportional to 5,307.64, 7,319.10 and 3,979.24 is: 5,487.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,307.64 : 7,319.10 = 3,979.24 : x
  2. Step 2: Convert to fraction form
    5,307.64/7,319.10 = 3,979.24/x
  3. Step 3: Cross multiply
    5,307.64x = 7,319.10 × 3,979.24
  4. Step 4: Simplify right side
    5,307.64x = 29,124,455.48
  5. Step 5: Solve for x
    x = 29,124,455.48/5,307.64
  6. Step 6: Final answer
    x = 5,487.27

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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.