Home / 428,126.32-642,319.04-161,968.40

Finding the Fourth Proportional to 428,126.32, 642,319.04 and 161,968.40

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Solution

The fourth proportional to 428,126.32, 642,319.04 and 161,968.40 is: 243,001.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,126.32 : 642,319.04 = 161,968.40 : x
  2. Step 2: Convert to fraction form
    428,126.32/642,319.04 = 161,968.40/x
  3. Step 3: Cross multiply
    428,126.32x = 642,319.04 × 161,968.40
  4. Step 4: Simplify right side
    428,126.32x = 104,035,387,198.34
  5. Step 5: Solve for x
    x = 104,035,387,198.34/428,126.32
  6. Step 6: Final answer
    x = 243,001.62

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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.