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Finding the Fourth Proportional to 886,805.90, 1,330,208.85 and 872,809.10

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Solution

The fourth proportional to 886,805.90, 1,330,208.85 and 872,809.10 is: 1,309,213.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,805.90 : 1,330,208.85 = 872,809.10 : x
  2. Step 2: Convert to fraction form
    886,805.90/1,330,208.85 = 872,809.10/x
  3. Step 3: Cross multiply
    886,805.90x = 1,330,208.85 × 872,809.10
  4. Step 4: Simplify right side
    886,805.90x = 1,161,018,389,180.54
  5. Step 5: Solve for x
    x = 1,161,018,389,180.54/886,805.90
  6. Step 6: Final answer
    x = 1,309,213.65

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Double scale
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Similar ratio
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1.5x scale

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.