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Finding the Fourth Proportional to 281,399.28, 388,316 and 154,050.32

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Solution

The fourth proportional to 281,399.28, 388,316 and 154,050.32 is: 212,581.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,399.28 : 388,316 = 154,050.32 : x
  2. Step 2: Convert to fraction form
    281,399.28/388,316 = 154,050.32/x
  3. Step 3: Cross multiply
    281,399.28x = 388,316 × 154,050.32
  4. Step 4: Simplify right side
    281,399.28x = 59,820,204,061.12
  5. Step 5: Solve for x
    x = 59,820,204,061.12/281,399.28
  6. Step 6: Final answer
    x = 212,581.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.