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Finding the Fourth Proportional to 1,317.71, 1,983.71 and 1,202.89

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Solution

The fourth proportional to 1,317.71, 1,983.71 and 1,202.89 is: 1,810.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.71 : 1,983.71 = 1,202.89 : x
  2. Step 2: Convert to fraction form
    1,317.71/1,983.71 = 1,202.89/x
  3. Step 3: Cross multiply
    1,317.71x = 1,983.71 × 1,202.89
  4. Step 4: Simplify right side
    1,317.71x = 2,386,184.92
  5. Step 5: Solve for x
    x = 2,386,184.92/1,317.71
  6. Step 6: Final answer
    x = 1,810.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.