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Finding the Fourth Proportional to 868,991.20, 1,303,486.80 and 806,005.60

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Solution

The fourth proportional to 868,991.20, 1,303,486.80 and 806,005.60 is: 1,209,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,991.20 : 1,303,486.80 = 806,005.60 : x
  2. Step 2: Convert to fraction form
    868,991.20/1,303,486.80 = 806,005.60/x
  3. Step 3: Cross multiply
    868,991.20x = 1,303,486.80 × 806,005.60
  4. Step 4: Simplify right side
    868,991.20x = 1,050,617,660,326.08
  5. Step 5: Solve for x
    x = 1,050,617,660,326.08/868,991.20
  6. Step 6: Final answer
    x = 1,209,008.40

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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.