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Finding the Fourth Proportional to 872,309.80, 1,314,401.83 and 717,999.40

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Solution

The fourth proportional to 872,309.80, 1,314,401.83 and 717,999.40 is: 1,081,885.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,309.80 : 1,314,401.83 = 717,999.40 : x
  2. Step 2: Convert to fraction form
    872,309.80/1,314,401.83 = 717,999.40/x
  3. Step 3: Cross multiply
    872,309.80x = 1,314,401.83 × 717,999.40
  4. Step 4: Simplify right side
    872,309.80x = 943,739,725,298.90
  5. Step 5: Solve for x
    x = 943,739,725,298.90/872,309.80
  6. Step 6: Final answer
    x = 1,081,885.96

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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.