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Finding the Fourth Proportional to 1,300.79, 1,952.12 and 774.90

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Solution

The fourth proportional to 1,300.79, 1,952.12 and 774.90 is: 1,162.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300.79 : 1,952.12 = 774.90 : x
  2. Step 2: Convert to fraction form
    1,300.79/1,952.12 = 774.90/x
  3. Step 3: Cross multiply
    1,300.79x = 1,952.12 × 774.90
  4. Step 4: Simplify right side
    1,300.79x = 1,512,699.73
  5. Step 5: Solve for x
    x = 1,512,699.73/1,300.79
  6. Step 6: Final answer
    x = 1,162.91

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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.