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Finding the Fourth Proportional to 1,315,681.22, 1,815,640.05 and 712,069.22

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Solution

The fourth proportional to 1,315,681.22, 1,815,640.05 and 712,069.22 is: 982,655.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,681.22 : 1,815,640.05 = 712,069.22 : x
  2. Step 2: Convert to fraction form
    1,315,681.22/1,815,640.05 = 712,069.22/x
  3. Step 3: Cross multiply
    1,315,681.22x = 1,815,640.05 × 712,069.22
  4. Step 4: Simplify right side
    1,315,681.22x = 1,292,861,394,204.26
  5. Step 5: Solve for x
    x = 1,292,861,394,204.26/1,315,681.22
  6. Step 6: Final answer
    x = 982,655.51

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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.