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Finding the Fourth Proportional to 1,184.80, 1,777.28 and 752.80

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Solution

The fourth proportional to 1,184.80, 1,777.28 and 752.80 is: 1,129.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,184.80 : 1,777.28 = 752.80 : x
  2. Step 2: Convert to fraction form
    1,184.80/1,777.28 = 752.80/x
  3. Step 3: Cross multiply
    1,184.80x = 1,777.28 × 752.80
  4. Step 4: Simplify right side
    1,184.80x = 1,337,936.38
  5. Step 5: Solve for x
    x = 1,337,936.38/1,184.80
  6. Step 6: Final answer
    x = 1,129.25

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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.