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Finding the Fourth Proportional to 1,135.66, 1,567.41 and 663.49

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Solution

The fourth proportional to 1,135.66, 1,567.41 and 663.49 is: 915.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.66 : 1,567.41 = 663.49 : x
  2. Step 2: Convert to fraction form
    1,135.66/1,567.41 = 663.49/x
  3. Step 3: Cross multiply
    1,135.66x = 1,567.41 × 663.49
  4. Step 4: Simplify right side
    1,135.66x = 1,039,960.86
  5. Step 5: Solve for x
    x = 1,039,960.86/1,135.66
  6. Step 6: Final answer
    x = 915.73

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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.