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Finding the Fourth Proportional to 5,124.80, 7,687.20 and 1,662.40

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Solution

The fourth proportional to 5,124.80, 7,687.20 and 1,662.40 is: 2,493.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,124.80 : 7,687.20 = 1,662.40 : x
  2. Step 2: Convert to fraction form
    5,124.80/7,687.20 = 1,662.40/x
  3. Step 3: Cross multiply
    5,124.80x = 7,687.20 × 1,662.40
  4. Step 4: Simplify right side
    5,124.80x = 12,779,201.28
  5. Step 5: Solve for x
    x = 12,779,201.28/5,124.80
  6. Step 6: Final answer
    x = 2,493.60

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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.