Home / 428,632.20-642,705.30-162,401.40

Finding the Fourth Proportional to 428,632.20, 642,705.30 and 162,401.40

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Solution

The fourth proportional to 428,632.20, 642,705.30 and 162,401.40 is: 243,510.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,632.20 : 642,705.30 = 162,401.40 : x
  2. Step 2: Convert to fraction form
    428,632.20/642,705.30 = 162,401.40/x
  3. Step 3: Cross multiply
    428,632.20x = 642,705.30 × 162,401.40
  4. Step 4: Simplify right side
    428,632.20x = 104,376,240,507.42
  5. Step 5: Solve for x
    x = 104,376,240,507.42/428,632.20
  6. Step 6: Final answer
    x = 243,510.03

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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.