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Finding the Fourth Proportional to 268,328.70, 402,147.45 and 205,688.70

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Solution

The fourth proportional to 268,328.70, 402,147.45 and 205,688.70 is: 308,268.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,328.70 : 402,147.45 = 205,688.70 : x
  2. Step 2: Convert to fraction form
    268,328.70/402,147.45 = 205,688.70/x
  3. Step 3: Cross multiply
    268,328.70x = 402,147.45 × 205,688.70
  4. Step 4: Simplify right side
    268,328.70x = 82,717,186,198.82
  5. Step 5: Solve for x
    x = 82,717,186,198.82/268,328.70
  6. Step 6: Final answer
    x = 308,268.13

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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.