Home / 428,811.06-642,762.78-144,230.70

Finding the Fourth Proportional to 428,811.06, 642,762.78 and 144,230.70

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Solution

The fourth proportional to 428,811.06, 642,762.78 and 144,230.70 is: 216,193.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,811.06 : 642,762.78 = 144,230.70 : x
  2. Step 2: Convert to fraction form
    428,811.06/642,762.78 = 144,230.70/x
  3. Step 3: Cross multiply
    428,811.06x = 642,762.78 × 144,230.70
  4. Step 4: Simplify right side
    428,811.06x = 92,706,125,693.35
  5. Step 5: Solve for x
    x = 92,706,125,693.35/428,811.06
  6. Step 6: Final answer
    x = 216,193.41

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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.