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Finding the Fourth Proportional to 1,088.88, 1,502.85 and 646.94

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Solution

The fourth proportional to 1,088.88, 1,502.85 and 646.94 is: 892.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.88 : 1,502.85 = 646.94 : x
  2. Step 2: Convert to fraction form
    1,088.88/1,502.85 = 646.94/x
  3. Step 3: Cross multiply
    1,088.88x = 1,502.85 × 646.94
  4. Step 4: Simplify right side
    1,088.88x = 972,253.78
  5. Step 5: Solve for x
    x = 972,253.78/1,088.88
  6. Step 6: Final answer
    x = 892.89

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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.