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Finding the Fourth Proportional to 920.24, 1,269.45 and 625.70

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Solution

The fourth proportional to 920.24, 1,269.45 and 625.70 is: 863.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.24 : 1,269.45 = 625.70 : x
  2. Step 2: Convert to fraction form
    920.24/1,269.45 = 625.70/x
  3. Step 3: Cross multiply
    920.24x = 1,269.45 × 625.70
  4. Step 4: Simplify right side
    920.24x = 794,294.87
  5. Step 5: Solve for x
    x = 794,294.87/920.24
  6. Step 6: Final answer
    x = 863.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.