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Finding the Fourth Proportional to 1,316.85, 1,817.34 and 757.48

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Solution

The fourth proportional to 1,316.85, 1,817.34 and 757.48 is: 1,045.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.85 : 1,817.34 = 757.48 : x
  2. Step 2: Convert to fraction form
    1,316.85/1,817.34 = 757.48/x
  3. Step 3: Cross multiply
    1,316.85x = 1,817.34 × 757.48
  4. Step 4: Simplify right side
    1,316.85x = 1,376,598.70
  5. Step 5: Solve for x
    x = 1,376,598.70/1,316.85
  6. Step 6: Final answer
    x = 1,045.37

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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.