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Finding the Fourth Proportional to 1,008.89, 1,393.07 and 673.12

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Solution

The fourth proportional to 1,008.89, 1,393.07 and 673.12 is: 929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.89 : 1,393.07 = 673.12 : x
  2. Step 2: Convert to fraction form
    1,008.89/1,393.07 = 673.12/x
  3. Step 3: Cross multiply
    1,008.89x = 1,393.07 × 673.12
  4. Step 4: Simplify right side
    1,008.89x = 937,703.28
  5. Step 5: Solve for x
    x = 937,703.28/1,008.89
  6. Step 6: Final answer
    x = 929.44

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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.