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Finding the Fourth Proportional to 922.68, 1,384.24 and 345.56

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Solution

The fourth proportional to 922.68, 1,384.24 and 345.56 is: 518.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.68 : 1,384.24 = 345.56 : x
  2. Step 2: Convert to fraction form
    922.68/1,384.24 = 345.56/x
  3. Step 3: Cross multiply
    922.68x = 1,384.24 × 345.56
  4. Step 4: Simplify right side
    922.68x = 478,337.97
  5. Step 5: Solve for x
    x = 478,337.97/922.68
  6. Step 6: Final answer
    x = 518.42

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Double scale
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1.5x scale

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.