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Finding the Fourth Proportional to 761.94, 1,140.57 and 500.94

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Solution

The fourth proportional to 761.94, 1,140.57 and 500.94 is: 749.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.94 : 1,140.57 = 500.94 : x
  2. Step 2: Convert to fraction form
    761.94/1,140.57 = 500.94/x
  3. Step 3: Cross multiply
    761.94x = 1,140.57 × 500.94
  4. Step 4: Simplify right side
    761.94x = 571,357.14
  5. Step 5: Solve for x
    x = 571,357.14/761.94
  6. Step 6: Final answer
    x = 749.87

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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.