Home / 428,724.33-643,111.74-144,391.11

Finding the Fourth Proportional to 428,724.33, 643,111.74 and 144,391.11

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Solution

The fourth proportional to 428,724.33, 643,111.74 and 144,391.11 is: 216,595.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,724.33 : 643,111.74 = 144,391.11 : x
  2. Step 2: Convert to fraction form
    428,724.33/643,111.74 = 144,391.11/x
  3. Step 3: Cross multiply
    428,724.33x = 643,111.74 × 144,391.11
  4. Step 4: Simplify right side
    428,724.33x = 92,859,617,992.63
  5. Step 5: Solve for x
    x = 92,859,617,992.63/428,724.33
  6. Step 6: Final answer
    x = 216,595.17

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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.