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Finding the Fourth Proportional to 922.69, 1,373.99 and 912.47

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Solution

The fourth proportional to 922.69, 1,373.99 and 912.47 is: 1,358.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.69 : 1,373.99 = 912.47 : x
  2. Step 2: Convert to fraction form
    922.69/1,373.99 = 912.47/x
  3. Step 3: Cross multiply
    922.69x = 1,373.99 × 912.47
  4. Step 4: Simplify right side
    922.69x = 1,253,715.79
  5. Step 5: Solve for x
    x = 1,253,715.79/922.69
  6. Step 6: Final answer
    x = 1,358.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.