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Finding the Fourth Proportional to 308,542.20, 462,813.30 and 257,803.80

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Solution

The fourth proportional to 308,542.20, 462,813.30 and 257,803.80 is: 386,705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,542.20 : 462,813.30 = 257,803.80 : x
  2. Step 2: Convert to fraction form
    308,542.20/462,813.30 = 257,803.80/x
  3. Step 3: Cross multiply
    308,542.20x = 462,813.30 × 257,803.80
  4. Step 4: Simplify right side
    308,542.20x = 119,315,027,430.54
  5. Step 5: Solve for x
    x = 119,315,027,430.54/308,542.20
  6. Step 6: Final answer
    x = 386,705.70

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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.