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Finding the Fourth Proportional to 1,712.62, 2,569.09 and 788.43

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Solution

The fourth proportional to 1,712.62, 2,569.09 and 788.43 is: 1,182.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.62 : 2,569.09 = 788.43 : x
  2. Step 2: Convert to fraction form
    1,712.62/2,569.09 = 788.43/x
  3. Step 3: Cross multiply
    1,712.62x = 2,569.09 × 788.43
  4. Step 4: Simplify right side
    1,712.62x = 2,025,547.63
  5. Step 5: Solve for x
    x = 2,025,547.63/1,712.62
  6. Step 6: Final answer
    x = 1,182.72

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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.