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Finding the Fourth Proportional to 868,805.60, 1,303,208.40 and 721,839.20

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Solution

The fourth proportional to 868,805.60, 1,303,208.40 and 721,839.20 is: 1,082,758.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,805.60 : 1,303,208.40 = 721,839.20 : x
  2. Step 2: Convert to fraction form
    868,805.60/1,303,208.40 = 721,839.20/x
  3. Step 3: Cross multiply
    868,805.60x = 1,303,208.40 × 721,839.20
  4. Step 4: Simplify right side
    868,805.60x = 940,706,908,889.28
  5. Step 5: Solve for x
    x = 940,706,908,889.28/868,805.60
  6. Step 6: Final answer
    x = 1,082,758.80

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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.