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Finding the Fourth Proportional to 1,869,909.40, 2,805,009.90 and 804,986.20

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Solution

The fourth proportional to 1,869,909.40, 2,805,009.90 and 804,986.20 is: 1,207,542.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869,909.40 : 2,805,009.90 = 804,986.20 : x
  2. Step 2: Convert to fraction form
    1,869,909.40/2,805,009.90 = 804,986.20/x
  3. Step 3: Cross multiply
    1,869,909.40x = 2,805,009.90 × 804,986.20
  4. Step 4: Simplify right side
    1,869,909.40x = 2,257,994,260,363.38
  5. Step 5: Solve for x
    x = 2,257,994,260,363.38/1,869,909.40
  6. Step 6: Final answer
    x = 1,207,542.07

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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.