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Finding the Fourth Proportional to 5,624.80, 8,437.20 and 1,520.80

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Solution

The fourth proportional to 5,624.80, 8,437.20 and 1,520.80 is: 2,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,624.80 : 8,437.20 = 1,520.80 : x
  2. Step 2: Convert to fraction form
    5,624.80/8,437.20 = 1,520.80/x
  3. Step 3: Cross multiply
    5,624.80x = 8,437.20 × 1,520.80
  4. Step 4: Simplify right side
    5,624.80x = 12,831,293.76
  5. Step 5: Solve for x
    x = 12,831,293.76/5,624.80
  6. Step 6: Final answer
    x = 2,281.20

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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.