Home / 428,223.71-642,345.96-143,918.39

Finding the Fourth Proportional to 428,223.71, 642,345.96 and 143,918.39

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Solution

The fourth proportional to 428,223.71, 642,345.96 and 143,918.39 is: 215,881.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,223.71 : 642,345.96 = 143,918.39 : x
  2. Step 2: Convert to fraction form
    428,223.71/642,345.96 = 143,918.39/x
  3. Step 3: Cross multiply
    428,223.71x = 642,345.96 × 143,918.39
  4. Step 4: Simplify right side
    428,223.71x = 92,445,396,386.20
  5. Step 5: Solve for x
    x = 92,445,396,386.20/428,223.71
  6. Step 6: Final answer
    x = 215,881.08

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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.