Home / 428,045.19-642,095.46-143,724.30

Finding the Fourth Proportional to 428,045.19, 642,095.46 and 143,724.30

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Solution

The fourth proportional to 428,045.19, 642,095.46 and 143,724.30 is: 215,595.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,045.19 : 642,095.46 = 143,724.30 : x
  2. Step 2: Convert to fraction form
    428,045.19/642,095.46 = 143,724.30/x
  3. Step 3: Cross multiply
    428,045.19x = 642,095.46 × 143,724.30
  4. Step 4: Simplify right side
    428,045.19x = 92,284,720,521.68
  5. Step 5: Solve for x
    x = 92,284,720,521.68/428,045.19
  6. Step 6: Final answer
    x = 215,595.74

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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.