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Finding the Fourth Proportional to 1,088.38, 1,502.20 and 646.54

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Solution

The fourth proportional to 1,088.38, 1,502.20 and 646.54 is: 892.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.38 : 1,502.20 = 646.54 : x
  2. Step 2: Convert to fraction form
    1,088.38/1,502.20 = 646.54/x
  3. Step 3: Cross multiply
    1,088.38x = 1,502.20 × 646.54
  4. Step 4: Simplify right side
    1,088.38x = 971,232.39
  5. Step 5: Solve for x
    x = 971,232.39/1,088.38
  6. Step 6: Final answer
    x = 892.37

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1.5x scale

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.