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Finding the Fourth Proportional to 891.56, 1,333.98 and 618.18

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Solution

The fourth proportional to 891.56, 1,333.98 and 618.18 is: 924.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.56 : 1,333.98 = 618.18 : x
  2. Step 2: Convert to fraction form
    891.56/1,333.98 = 618.18/x
  3. Step 3: Cross multiply
    891.56x = 1,333.98 × 618.18
  4. Step 4: Simplify right side
    891.56x = 824,639.76
  5. Step 5: Solve for x
    x = 824,639.76/891.56
  6. Step 6: Final answer
    x = 924.94

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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.