Home / 428,347.14-642,601.81-172,199.55

Finding the Fourth Proportional to 428,347.14, 642,601.81 and 172,199.55

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Solution

The fourth proportional to 428,347.14, 642,601.81 and 172,199.55 is: 258,331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,347.14 : 642,601.81 = 172,199.55 : x
  2. Step 2: Convert to fraction form
    428,347.14/642,601.81 = 172,199.55/x
  3. Step 3: Cross multiply
    428,347.14x = 642,601.81 × 172,199.55
  4. Step 4: Simplify right side
    428,347.14x = 110,655,745,136.19
  5. Step 5: Solve for x
    x = 110,655,745,136.19/428,347.14
  6. Step 6: Final answer
    x = 258,331.94

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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.