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Finding the Fourth Proportional to 1,201.67, 1,658.13 and 670.57

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Solution

The fourth proportional to 1,201.67, 1,658.13 and 670.57 is: 925.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.67 : 1,658.13 = 670.57 : x
  2. Step 2: Convert to fraction form
    1,201.67/1,658.13 = 670.57/x
  3. Step 3: Cross multiply
    1,201.67x = 1,658.13 × 670.57
  4. Step 4: Simplify right side
    1,201.67x = 1,111,887.96
  5. Step 5: Solve for x
    x = 1,111,887.96/1,201.67
  6. Step 6: Final answer
    x = 925.28

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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.