Home / 781,621.60-1,172,821.20-308,322.40

Finding the Fourth Proportional to 781,621.60, 1,172,821.20 and 308,322.40

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Solution

The fourth proportional to 781,621.60, 1,172,821.20 and 308,322.40 is: 462,636.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,621.60 : 1,172,821.20 = 308,322.40 : x
  2. Step 2: Convert to fraction form
    781,621.60/1,172,821.20 = 308,322.40/x
  3. Step 3: Cross multiply
    781,621.60x = 1,172,821.20 × 308,322.40
  4. Step 4: Simplify right side
    781,621.60x = 361,607,047,154.88
  5. Step 5: Solve for x
    x = 361,607,047,154.88/781,621.60
  6. Step 6: Final answer
    x = 462,636.97

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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.