Home / 428,263.20-642,176.10-158,377.68

Finding the Fourth Proportional to 428,263.20, 642,176.10 and 158,377.68

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Solution

The fourth proportional to 428,263.20, 642,176.10 and 158,377.68 is: 237,485.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,263.20 : 642,176.10 = 158,377.68 : x
  2. Step 2: Convert to fraction form
    428,263.20/642,176.10 = 158,377.68/x
  3. Step 3: Cross multiply
    428,263.20x = 642,176.10 × 158,377.68
  4. Step 4: Simplify right side
    428,263.20x = 101,706,360,869.45
  5. Step 5: Solve for x
    x = 101,706,360,869.45/428,263.20
  6. Step 6: Final answer
    x = 237,485.64

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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.