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Finding the Fourth Proportional to 5,287.80, 7,931.70 and 4,801.80

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Solution

The fourth proportional to 5,287.80, 7,931.70 and 4,801.80 is: 7,202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.80 : 7,931.70 = 4,801.80 : x
  2. Step 2: Convert to fraction form
    5,287.80/7,931.70 = 4,801.80/x
  3. Step 3: Cross multiply
    5,287.80x = 7,931.70 × 4,801.80
  4. Step 4: Simplify right side
    5,287.80x = 38,086,437.06
  5. Step 5: Solve for x
    x = 38,086,437.06/5,287.80
  6. Step 6: Final answer
    x = 7,202.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.