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Finding the Fourth Proportional to 920.23, 1,269.36 and 671.24

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Solution

The fourth proportional to 920.23, 1,269.36 and 671.24 is: 925.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.23 : 1,269.36 = 671.24 : x
  2. Step 2: Convert to fraction form
    920.23/1,269.36 = 671.24/x
  3. Step 3: Cross multiply
    920.23x = 1,269.36 × 671.24
  4. Step 4: Simplify right side
    920.23x = 852,048.38
  5. Step 5: Solve for x
    x = 852,048.38/920.23
  6. Step 6: Final answer
    x = 925.91

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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.