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Finding the Fourth Proportional to 1,089.08, 1,502.44 and 646.73

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Solution

The fourth proportional to 1,089.08, 1,502.44 and 646.73 is: 892.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.08 : 1,502.44 = 646.73 : x
  2. Step 2: Convert to fraction form
    1,089.08/1,502.44 = 646.73/x
  3. Step 3: Cross multiply
    1,089.08x = 1,502.44 × 646.73
  4. Step 4: Simplify right side
    1,089.08x = 971,673.02
  5. Step 5: Solve for x
    x = 971,673.02/1,089.08
  6. Step 6: Final answer
    x = 892.20

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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.