Home / 428,724.58-643,112.12-144,391.36

Finding the Fourth Proportional to 428,724.58, 643,112.12 and 144,391.36

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Solution

The fourth proportional to 428,724.58, 643,112.12 and 144,391.36 is: 216,595.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,724.58 : 643,112.12 = 144,391.36 : x
  2. Step 2: Convert to fraction form
    428,724.58/643,112.12 = 144,391.36/x
  3. Step 3: Cross multiply
    428,724.58x = 643,112.12 × 144,391.36
  4. Step 4: Simplify right side
    428,724.58x = 92,859,833,639.28
  5. Step 5: Solve for x
    x = 92,859,833,639.28/428,724.58
  6. Step 6: Final answer
    x = 216,595.54

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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.