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Finding the Fourth Proportional to 821,900.40, 1,233,086.76 and 342,034.80

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Solution

The fourth proportional to 821,900.40, 1,233,086.76 and 342,034.80 is: 513,150.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,900.40 : 1,233,086.76 = 342,034.80 : x
  2. Step 2: Convert to fraction form
    821,900.40/1,233,086.76 = 342,034.80/x
  3. Step 3: Cross multiply
    821,900.40x = 1,233,086.76 × 342,034.80
  4. Step 4: Simplify right side
    821,900.40x = 421,758,583,339.25
  5. Step 5: Solve for x
    x = 421,758,583,339.25/821,900.40
  6. Step 6: Final answer
    x = 513,150.48

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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.