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Finding the Fourth Proportional to 5,279.88, 7,955.02 and 4,780.16

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Solution

The fourth proportional to 5,279.88, 7,955.02 and 4,780.16 is: 7,202.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.88 : 7,955.02 = 4,780.16 : x
  2. Step 2: Convert to fraction form
    5,279.88/7,955.02 = 4,780.16/x
  3. Step 3: Cross multiply
    5,279.88x = 7,955.02 × 4,780.16
  4. Step 4: Simplify right side
    5,279.88x = 38,026,268.40
  5. Step 5: Solve for x
    x = 38,026,268.40/5,279.88
  6. Step 6: Final answer
    x = 7,202.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.