Home / 1,317.10-1,817.43-757.66

Finding the Fourth Proportional to 1,317.10, 1,817.43 and 757.66

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Solution

The fourth proportional to 1,317.10, 1,817.43 and 757.66 is: 1,045.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.10 : 1,817.43 = 757.66 : x
  2. Step 2: Convert to fraction form
    1,317.10/1,817.43 = 757.66/x
  3. Step 3: Cross multiply
    1,317.10x = 1,817.43 × 757.66
  4. Step 4: Simplify right side
    1,317.10x = 1,376,994.01
  5. Step 5: Solve for x
    x = 1,376,994.01/1,317.10
  6. Step 6: Final answer
    x = 1,045.47

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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.