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Finding the Fourth Proportional to 1,307.70, 1,960.11 and 793.14

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Solution

The fourth proportional to 1,307.70, 1,960.11 and 793.14 is: 1,188.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.70 : 1,960.11 = 793.14 : x
  2. Step 2: Convert to fraction form
    1,307.70/1,960.11 = 793.14/x
  3. Step 3: Cross multiply
    1,307.70x = 1,960.11 × 793.14
  4. Step 4: Simplify right side
    1,307.70x = 1,554,641.65
  5. Step 5: Solve for x
    x = 1,554,641.65/1,307.70
  6. Step 6: Final answer
    x = 1,188.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.