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Finding the Fourth Proportional to 1,713,712.80, 2,569,402.80 and 815,584.80

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Solution

The fourth proportional to 1,713,712.80, 2,569,402.80 and 815,584.80 is: 1,222,822.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,713,712.80 : 2,569,402.80 = 815,584.80 : x
  2. Step 2: Convert to fraction form
    1,713,712.80/2,569,402.80 = 815,584.80/x
  3. Step 3: Cross multiply
    1,713,712.80x = 2,569,402.80 × 815,584.80
  4. Step 4: Simplify right side
    1,713,712.80x = 2,095,565,868,757.44
  5. Step 5: Solve for x
    x = 2,095,565,868,757.44/1,713,712.80
  6. Step 6: Final answer
    x = 1,222,822.09

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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.