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Finding the Fourth Proportional to 696.19, 1,045.47 and 618.27

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Solution

The fourth proportional to 696.19, 1,045.47 and 618.27 is: 928.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.19 : 1,045.47 = 618.27 : x
  2. Step 2: Convert to fraction form
    696.19/1,045.47 = 618.27/x
  3. Step 3: Cross multiply
    696.19x = 1,045.47 × 618.27
  4. Step 4: Simplify right side
    696.19x = 646,382.74
  5. Step 5: Solve for x
    x = 646,382.74/696.19
  6. Step 6: Final answer
    x = 928.46

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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.