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Finding the Fourth Proportional to 1,307.34, 1,960.65 and 752.22

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Solution

The fourth proportional to 1,307.34, 1,960.65 and 752.22 is: 1,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.34 : 1,960.65 = 752.22 : x
  2. Step 2: Convert to fraction form
    1,307.34/1,960.65 = 752.22/x
  3. Step 3: Cross multiply
    1,307.34x = 1,960.65 × 752.22
  4. Step 4: Simplify right side
    1,307.34x = 1,474,840.14
  5. Step 5: Solve for x
    x = 1,474,840.14/1,307.34
  6. Step 6: Final answer
    x = 1,128.12

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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.