Home / 642,660.80-963,991.20-243,314.60

Finding the Fourth Proportional to 642,660.80, 963,991.20 and 243,314.60

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Solution

The fourth proportional to 642,660.80, 963,991.20 and 243,314.60 is: 364,971.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,660.80 : 963,991.20 = 243,314.60 : x
  2. Step 2: Convert to fraction form
    642,660.80/963,991.20 = 243,314.60/x
  3. Step 3: Cross multiply
    642,660.80x = 963,991.20 × 243,314.60
  4. Step 4: Simplify right side
    642,660.80x = 234,553,133,231.52
  5. Step 5: Solve for x
    x = 234,553,133,231.52/642,660.80
  6. Step 6: Final answer
    x = 364,971.90

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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.