Home / 1,117.24-1,541.92-669.40

Finding the Fourth Proportional to 1,117.24, 1,541.92 and 669.40

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Solution

The fourth proportional to 1,117.24, 1,541.92 and 669.40 is: 923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.24 : 1,541.92 = 669.40 : x
  2. Step 2: Convert to fraction form
    1,117.24/1,541.92 = 669.40/x
  3. Step 3: Cross multiply
    1,117.24x = 1,541.92 × 669.40
  4. Step 4: Simplify right side
    1,117.24x = 1,032,161.25
  5. Step 5: Solve for x
    x = 1,032,161.25/1,117.24
  6. Step 6: Final answer
    x = 923.85

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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.