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Finding the Fourth Proportional to 819,938.40, 1,230,829.20 and 633,775.20

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Solution

The fourth proportional to 819,938.40, 1,230,829.20 and 633,775.20 is: 951,375.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,938.40 : 1,230,829.20 = 633,775.20 : x
  2. Step 2: Convert to fraction form
    819,938.40/1,230,829.20 = 633,775.20/x
  3. Step 3: Cross multiply
    819,938.40x = 1,230,829.20 × 633,775.20
  4. Step 4: Simplify right side
    819,938.40x = 780,069,022,395.84
  5. Step 5: Solve for x
    x = 780,069,022,395.84/819,938.40
  6. Step 6: Final answer
    x = 951,375.16

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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.