Home / 428,000.22-642,236.61-238,567.22

Finding the Fourth Proportional to 428,000.22, 642,236.61 and 238,567.22

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Solution

The fourth proportional to 428,000.22, 642,236.61 and 238,567.22 is: 357,982.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,000.22 : 642,236.61 = 238,567.22 : x
  2. Step 2: Convert to fraction form
    428,000.22/642,236.61 = 238,567.22/x
  3. Step 3: Cross multiply
    428,000.22x = 642,236.61 × 238,567.22
  4. Step 4: Simplify right side
    428,000.22x = 153,216,599,418.74
  5. Step 5: Solve for x
    x = 153,216,599,418.74/428,000.22
  6. Step 6: Final answer
    x = 357,982.52

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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.