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Finding the Fourth Proportional to 1,363.19, 1,881.23 and 865.71

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Solution

The fourth proportional to 1,363.19, 1,881.23 and 865.71 is: 1,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.19 : 1,881.23 = 865.71 : x
  2. Step 2: Convert to fraction form
    1,363.19/1,881.23 = 865.71/x
  3. Step 3: Cross multiply
    1,363.19x = 1,881.23 × 865.71
  4. Step 4: Simplify right side
    1,363.19x = 1,628,595.29
  5. Step 5: Solve for x
    x = 1,628,595.29/1,363.19
  6. Step 6: Final answer
    x = 1,194.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.