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Finding the Fourth Proportional to 813,903.60, 1,222,021.80 and 615,615.60

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Solution

The fourth proportional to 813,903.60, 1,222,021.80 and 615,615.60 is: 924,305.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,903.60 : 1,222,021.80 = 615,615.60 : x
  2. Step 2: Convert to fraction form
    813,903.60/1,222,021.80 = 615,615.60/x
  3. Step 3: Cross multiply
    813,903.60x = 1,222,021.80 × 615,615.60
  4. Step 4: Simplify right side
    813,903.60x = 752,295,683,620.08
  5. Step 5: Solve for x
    x = 752,295,683,620.08/813,903.60
  6. Step 6: Final answer
    x = 924,305.63

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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.