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Finding the Fourth Proportional to 926.21, 1,278.40 and 572.43

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Solution

The fourth proportional to 926.21, 1,278.40 and 572.43 is: 790.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.21 : 1,278.40 = 572.43 : x
  2. Step 2: Convert to fraction form
    926.21/1,278.40 = 572.43/x
  3. Step 3: Cross multiply
    926.21x = 1,278.40 × 572.43
  4. Step 4: Simplify right side
    926.21x = 731,793.08
  5. Step 5: Solve for x
    x = 731,793.08/926.21
  6. Step 6: Final answer
    x = 790.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.