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Finding the Fourth Proportional to 922.80, 1,273.49 and 503.18

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Solution

The fourth proportional to 922.80, 1,273.49 and 503.18 is: 694.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.80 : 1,273.49 = 503.18 : x
  2. Step 2: Convert to fraction form
    922.80/1,273.49 = 503.18/x
  3. Step 3: Cross multiply
    922.80x = 1,273.49 × 503.18
  4. Step 4: Simplify right side
    922.80x = 640,785.81
  5. Step 5: Solve for x
    x = 640,785.81/922.80
  6. Step 6: Final answer
    x = 694.39

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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.