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Finding the Fourth Proportional to 660,069.39, 910,864.25 and 405,371.37

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Solution

The fourth proportional to 660,069.39, 910,864.25 and 405,371.37 is: 559,393.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,069.39 : 910,864.25 = 405,371.37 : x
  2. Step 2: Convert to fraction form
    660,069.39/910,864.25 = 405,371.37/x
  3. Step 3: Cross multiply
    660,069.39x = 910,864.25 × 405,371.37
  4. Step 4: Simplify right side
    660,069.39x = 369,238,288,972.15
  5. Step 5: Solve for x
    x = 369,238,288,972.15/660,069.39
  6. Step 6: Final answer
    x = 559,393.14

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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.