Home / 428,480.10-642,762.78-158,680.44

Finding the Fourth Proportional to 428,480.10, 642,762.78 and 158,680.44

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Solution

The fourth proportional to 428,480.10, 642,762.78 and 158,680.44 is: 238,036.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,480.10 : 642,762.78 = 158,680.44 : x
  2. Step 2: Convert to fraction form
    428,480.10/642,762.78 = 158,680.44/x
  3. Step 3: Cross multiply
    428,480.10x = 642,762.78 × 158,680.44
  4. Step 4: Simplify right side
    428,480.10x = 101,993,880,150.97
  5. Step 5: Solve for x
    x = 101,993,880,150.97/428,480.10
  6. Step 6: Final answer
    x = 238,036.45

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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.