Home / 1,218.13-1,681.14-694.24

Finding the Fourth Proportional to 1,218.13, 1,681.14 and 694.24

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Solution

The fourth proportional to 1,218.13, 1,681.14 and 694.24 is: 958.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.13 : 1,681.14 = 694.24 : x
  2. Step 2: Convert to fraction form
    1,218.13/1,681.14 = 694.24/x
  3. Step 3: Cross multiply
    1,218.13x = 1,681.14 × 694.24
  4. Step 4: Simplify right side
    1,218.13x = 1,167,114.63
  5. Step 5: Solve for x
    x = 1,167,114.63/1,218.13
  6. Step 6: Final answer
    x = 958.12

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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.