Home / 428,521.02-642,825.30-148,001.82

Finding the Fourth Proportional to 428,521.02, 642,825.30 and 148,001.82

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Solution

The fourth proportional to 428,521.02, 642,825.30 and 148,001.82 is: 222,017.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,521.02 : 642,825.30 = 148,001.82 : x
  2. Step 2: Convert to fraction form
    428,521.02/642,825.30 = 148,001.82/x
  3. Step 3: Cross multiply
    428,521.02x = 642,825.30 × 148,001.82
  4. Step 4: Simplify right side
    428,521.02x = 95,139,314,342.05
  5. Step 5: Solve for x
    x = 95,139,314,342.05/428,521.02
  6. Step 6: Final answer
    x = 222,017.85

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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.