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Finding the Fourth Proportional to 774.96, 1,162.90 and 288.35

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Solution

The fourth proportional to 774.96, 1,162.90 and 288.35 is: 432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.96 : 1,162.90 = 288.35 : x
  2. Step 2: Convert to fraction form
    774.96/1,162.90 = 288.35/x
  3. Step 3: Cross multiply
    774.96x = 1,162.90 × 288.35
  4. Step 4: Simplify right side
    774.96x = 335,322.22
  5. Step 5: Solve for x
    x = 335,322.22/774.96
  6. Step 6: Final answer
    x = 432.70

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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.