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Finding the Fourth Proportional to 660,057.50, 910,881.78 and 358,251.50

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Solution

The fourth proportional to 660,057.50, 910,881.78 and 358,251.50 is: 494,388.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,057.50 : 910,881.78 = 358,251.50 : x
  2. Step 2: Convert to fraction form
    660,057.50/910,881.78 = 358,251.50/x
  3. Step 3: Cross multiply
    660,057.50x = 910,881.78 × 358,251.50
  4. Step 4: Simplify right side
    660,057.50x = 326,324,764,007.67
  5. Step 5: Solve for x
    x = 326,324,764,007.67/660,057.50
  6. Step 6: Final answer
    x = 494,388.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.