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Finding the Fourth Proportional to 895.59, 1,228.64 and 839.70

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Solution

The fourth proportional to 895.59, 1,228.64 and 839.70 is: 1,151.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.59 : 1,228.64 = 839.70 : x
  2. Step 2: Convert to fraction form
    895.59/1,228.64 = 839.70/x
  3. Step 3: Cross multiply
    895.59x = 1,228.64 × 839.70
  4. Step 4: Simplify right side
    895.59x = 1,031,684.81
  5. Step 5: Solve for x
    x = 1,031,684.81/895.59
  6. Step 6: Final answer
    x = 1,151.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.