Home / 1,207.40-1,666.26-741.80

Finding the Fourth Proportional to 1,207.40, 1,666.26 and 741.80

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Solution

The fourth proportional to 1,207.40, 1,666.26 and 741.80 is: 1,023.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.40 : 1,666.26 = 741.80 : x
  2. Step 2: Convert to fraction form
    1,207.40/1,666.26 = 741.80/x
  3. Step 3: Cross multiply
    1,207.40x = 1,666.26 × 741.80
  4. Step 4: Simplify right side
    1,207.40x = 1,236,031.67
  5. Step 5: Solve for x
    x = 1,236,031.67/1,207.40
  6. Step 6: Final answer
    x = 1,023.71

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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.