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Finding the Fourth Proportional to 926.55, 1,278.52 and 528.21

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Solution

The fourth proportional to 926.55, 1,278.52 and 528.21 is: 728.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.55 : 1,278.52 = 528.21 : x
  2. Step 2: Convert to fraction form
    926.55/1,278.52 = 528.21/x
  3. Step 3: Cross multiply
    926.55x = 1,278.52 × 528.21
  4. Step 4: Simplify right side
    926.55x = 675,325.73
  5. Step 5: Solve for x
    x = 675,325.73/926.55
  6. Step 6: Final answer
    x = 728.86

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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.