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Finding the Fourth Proportional to 749.95, 1,123.71 and 567.70

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Solution

The fourth proportional to 749.95, 1,123.71 and 567.70 is: 850.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.95 : 1,123.71 = 567.70 : x
  2. Step 2: Convert to fraction form
    749.95/1,123.71 = 567.70/x
  3. Step 3: Cross multiply
    749.95x = 1,123.71 × 567.70
  4. Step 4: Simplify right side
    749.95x = 637,930.78
  5. Step 5: Solve for x
    x = 637,930.78/749.95
  6. Step 6: Final answer
    x = 850.63

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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.