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Finding the Fourth Proportional to 308,140.20, 462,210.30 and 139,660.20

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Solution

The fourth proportional to 308,140.20, 462,210.30 and 139,660.20 is: 209,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,140.20 : 462,210.30 = 139,660.20 : x
  2. Step 2: Convert to fraction form
    308,140.20/462,210.30 = 139,660.20/x
  3. Step 3: Cross multiply
    308,140.20x = 462,210.30 × 139,660.20
  4. Step 4: Simplify right side
    308,140.20x = 64,552,382,940.06
  5. Step 5: Solve for x
    x = 64,552,382,940.06/308,140.20
  6. Step 6: Final answer
    x = 209,490.30

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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.