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Finding the Fourth Proportional to 781,887.22, 1,078,448 and 717,564.22

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Solution

The fourth proportional to 781,887.22, 1,078,448 and 717,564.22 is: 989,728.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,887.22 : 1,078,448 = 717,564.22 : x
  2. Step 2: Convert to fraction form
    781,887.22/1,078,448 = 717,564.22/x
  3. Step 3: Cross multiply
    781,887.22x = 1,078,448 × 717,564.22
  4. Step 4: Simplify right side
    781,887.22x = 773,855,697,930.56
  5. Step 5: Solve for x
    x = 773,855,697,930.56/781,887.22
  6. Step 6: Final answer
    x = 989,728.03

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1.5x scale

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.