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Finding the Fourth Proportional to 755.24, 1,130.70 and 549.80

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Solution

The fourth proportional to 755.24, 1,130.70 and 549.80 is: 823.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.24 : 1,130.70 = 549.80 : x
  2. Step 2: Convert to fraction form
    755.24/1,130.70 = 549.80/x
  3. Step 3: Cross multiply
    755.24x = 1,130.70 × 549.80
  4. Step 4: Simplify right side
    755.24x = 621,658.86
  5. Step 5: Solve for x
    x = 621,658.86/755.24
  6. Step 6: Final answer
    x = 823.13

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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.