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Finding the Fourth Proportional to 4,870.80, 7,306.20 and 4,237.20

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Solution

The fourth proportional to 4,870.80, 7,306.20 and 4,237.20 is: 6,355.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,870.80 : 7,306.20 = 4,237.20 : x
  2. Step 2: Convert to fraction form
    4,870.80/7,306.20 = 4,237.20/x
  3. Step 3: Cross multiply
    4,870.80x = 7,306.20 × 4,237.20
  4. Step 4: Simplify right side
    4,870.80x = 30,957,830.64
  5. Step 5: Solve for x
    x = 30,957,830.64/4,870.80
  6. Step 6: Final answer
    x = 6,355.80

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Similar ratio
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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.