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Finding the Fourth Proportional to 259,280.80, 388,921.20 and 170,807.20

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Solution

The fourth proportional to 259,280.80, 388,921.20 and 170,807.20 is: 256,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,280.80 : 388,921.20 = 170,807.20 : x
  2. Step 2: Convert to fraction form
    259,280.80/388,921.20 = 170,807.20/x
  3. Step 3: Cross multiply
    259,280.80x = 388,921.20 × 170,807.20
  4. Step 4: Simplify right side
    259,280.80x = 66,430,541,192.64
  5. Step 5: Solve for x
    x = 66,430,541,192.64/259,280.80
  6. Step 6: Final answer
    x = 256,210.80

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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.