Home / 287,938.38-397,140.75-211,433.46

Finding the Fourth Proportional to 287,938.38, 397,140.75 and 211,433.46

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Solution

The fourth proportional to 287,938.38, 397,140.75 and 211,433.46 is: 291,620.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,938.38 : 397,140.75 = 211,433.46 : x
  2. Step 2: Convert to fraction form
    287,938.38/397,140.75 = 211,433.46/x
  3. Step 3: Cross multiply
    287,938.38x = 397,140.75 × 211,433.46
  4. Step 4: Simplify right side
    287,938.38x = 83,968,842,879.50
  5. Step 5: Solve for x
    x = 83,968,842,879.50/287,938.38
  6. Step 6: Final answer
    x = 291,620.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.