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Finding the Fourth Proportional to 5,388.48, 7,449.46 and 5,339.28

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Solution

The fourth proportional to 5,388.48, 7,449.46 and 5,339.28 is: 7,381.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.48 : 7,449.46 = 5,339.28 : x
  2. Step 2: Convert to fraction form
    5,388.48/7,449.46 = 5,339.28/x
  3. Step 3: Cross multiply
    5,388.48x = 7,449.46 × 5,339.28
  4. Step 4: Simplify right side
    5,388.48x = 39,774,752.79
  5. Step 5: Solve for x
    x = 39,774,752.79/5,388.48
  6. Step 6: Final answer
    x = 7,381.44

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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.