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Finding the Fourth Proportional to 1,708, 2,562.06 and 780.79

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Solution

The fourth proportional to 1,708, 2,562.06 and 780.79 is: 1,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708 : 2,562.06 = 780.79 : x
  2. Step 2: Convert to fraction form
    1,708/2,562.06 = 780.79/x
  3. Step 3: Cross multiply
    1,708x = 2,562.06 × 780.79
  4. Step 4: Simplify right side
    1,708x = 2,000,430.83
  5. Step 5: Solve for x
    x = 2,000,430.83/1,708
  6. Step 6: Final answer
    x = 1,171.21

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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.