Home / 1,317.49-1,818.14-757.98

Finding the Fourth Proportional to 1,317.49, 1,818.14 and 757.98

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Solution

The fourth proportional to 1,317.49, 1,818.14 and 757.98 is: 1,046.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.49 : 1,818.14 = 757.98 : x
  2. Step 2: Convert to fraction form
    1,317.49/1,818.14 = 757.98/x
  3. Step 3: Cross multiply
    1,317.49x = 1,818.14 × 757.98
  4. Step 4: Simplify right side
    1,317.49x = 1,378,109.97
  5. Step 5: Solve for x
    x = 1,378,109.97/1,317.49
  6. Step 6: Final answer
    x = 1,046.01

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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.