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Finding the Fourth Proportional to 753.55, 1,130.68 and 266.83

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Solution

The fourth proportional to 753.55, 1,130.68 and 266.83 is: 400.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.55 : 1,130.68 = 266.83 : x
  2. Step 2: Convert to fraction form
    753.55/1,130.68 = 266.83/x
  3. Step 3: Cross multiply
    753.55x = 1,130.68 × 266.83
  4. Step 4: Simplify right side
    753.55x = 301,699.34
  5. Step 5: Solve for x
    x = 301,699.34/753.55
  6. Step 6: Final answer
    x = 400.37

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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.