Home / 281,406.72-421,440-162,828.16

Finding the Fourth Proportional to 281,406.72, 421,440 and 162,828.16

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Solution

The fourth proportional to 281,406.72, 421,440 and 162,828.16 is: 243,854.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,406.72 : 421,440 = 162,828.16 : x
  2. Step 2: Convert to fraction form
    281,406.72/421,440 = 162,828.16/x
  3. Step 3: Cross multiply
    281,406.72x = 421,440 × 162,828.16
  4. Step 4: Simplify right side
    281,406.72x = 68,622,299,750.40
  5. Step 5: Solve for x
    x = 68,622,299,750.40/281,406.72
  6. Step 6: Final answer
    x = 243,854.52

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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.