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Finding the Fourth Proportional to 660,069.41, 910,864.26 and 405,371.39

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Solution

The fourth proportional to 660,069.41, 910,864.26 and 405,371.39 is: 559,393.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,069.41 : 910,864.26 = 405,371.39 : x
  2. Step 2: Convert to fraction form
    660,069.41/910,864.26 = 405,371.39/x
  3. Step 3: Cross multiply
    660,069.41x = 910,864.26 × 405,371.39
  4. Step 4: Simplify right side
    660,069.41x = 369,238,306,623.20
  5. Step 5: Solve for x
    x = 369,238,306,623.20/660,069.41
  6. Step 6: Final answer
    x = 559,393.15

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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.