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Finding the Fourth Proportional to 838,420.80, 1,257,517.80 and 333,353.40

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Solution

The fourth proportional to 838,420.80, 1,257,517.80 and 333,353.40 is: 499,985.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,420.80 : 1,257,517.80 = 333,353.40 : x
  2. Step 2: Convert to fraction form
    838,420.80/1,257,517.80 = 333,353.40/x
  3. Step 3: Cross multiply
    838,420.80x = 1,257,517.80 × 333,353.40
  4. Step 4: Simplify right side
    838,420.80x = 419,197,834,190.52
  5. Step 5: Solve for x
    x = 419,197,834,190.52/838,420.80
  6. Step 6: Final answer
    x = 499,985.01

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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.