Home / 428,269.70-642,185.85-158,384.18

Finding the Fourth Proportional to 428,269.70, 642,185.85 and 158,384.18

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Solution

The fourth proportional to 428,269.70, 642,185.85 and 158,384.18 is: 237,495.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,269.70 : 642,185.85 = 158,384.18 : x
  2. Step 2: Convert to fraction form
    428,269.70/642,185.85 = 158,384.18/x
  3. Step 3: Cross multiply
    428,269.70x = 642,185.85 × 158,384.18
  4. Step 4: Simplify right side
    428,269.70x = 101,712,079,259.85
  5. Step 5: Solve for x
    x = 101,712,079,259.85/428,269.70
  6. Step 6: Final answer
    x = 237,495.39

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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.