Home / 820,621.60-1,230,241.20-426,637.60

Finding the Fourth Proportional to 820,621.60, 1,230,241.20 and 426,637.60

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Solution

The fourth proportional to 820,621.60, 1,230,241.20 and 426,637.60 is: 639,597.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,621.60 : 1,230,241.20 = 426,637.60 : x
  2. Step 2: Convert to fraction form
    820,621.60/1,230,241.20 = 426,637.60/x
  3. Step 3: Cross multiply
    820,621.60x = 1,230,241.20 × 426,637.60
  4. Step 4: Simplify right side
    820,621.60x = 524,867,152,989.12
  5. Step 5: Solve for x
    x = 524,867,152,989.12/820,621.60
  6. Step 6: Final answer
    x = 639,597.05

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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.