Home / 791,812.80-1,187,719.20-318,837.60

Finding the Fourth Proportional to 791,812.80, 1,187,719.20 and 318,837.60

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Solution

The fourth proportional to 791,812.80, 1,187,719.20 and 318,837.60 is: 478,256.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,812.80 : 1,187,719.20 = 318,837.60 : x
  2. Step 2: Convert to fraction form
    791,812.80/1,187,719.20 = 318,837.60/x
  3. Step 3: Cross multiply
    791,812.80x = 1,187,719.20 × 318,837.60
  4. Step 4: Simplify right side
    791,812.80x = 378,689,539,201.92
  5. Step 5: Solve for x
    x = 378,689,539,201.92/791,812.80
  6. Step 6: Final answer
    x = 478,256.40

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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.