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Finding the Fourth Proportional to 926.55, 1,278.33 and 553.34

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Solution

The fourth proportional to 926.55, 1,278.33 and 553.34 is: 763.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.55 : 1,278.33 = 553.34 : x
  2. Step 2: Convert to fraction form
    926.55/1,278.33 = 553.34/x
  3. Step 3: Cross multiply
    926.55x = 1,278.33 × 553.34
  4. Step 4: Simplify right side
    926.55x = 707,344.73
  5. Step 5: Solve for x
    x = 707,344.73/926.55
  6. Step 6: Final answer
    x = 763.42

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Half scale
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Double scale
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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.