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Finding the Fourth Proportional to 1,095.84, 1,642.55 and 517.50

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Solution

The fourth proportional to 1,095.84, 1,642.55 and 517.50 is: 775.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.84 : 1,642.55 = 517.50 : x
  2. Step 2: Convert to fraction form
    1,095.84/1,642.55 = 517.50/x
  3. Step 3: Cross multiply
    1,095.84x = 1,642.55 × 517.50
  4. Step 4: Simplify right side
    1,095.84x = 850,017.04
  5. Step 5: Solve for x
    x = 850,017.04/1,095.84
  6. Step 6: Final answer
    x = 775.68

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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.