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Finding the Fourth Proportional to 718,872.95, 992,044.62 and 396,583.06

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Solution

The fourth proportional to 718,872.95, 992,044.62 and 396,583.06 is: 547,284.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,872.95 : 992,044.62 = 396,583.06 : x
  2. Step 2: Convert to fraction form
    718,872.95/992,044.62 = 396,583.06/x
  3. Step 3: Cross multiply
    718,872.95x = 992,044.62 × 396,583.06
  4. Step 4: Simplify right side
    718,872.95x = 393,428,084,113.00
  5. Step 5: Solve for x
    x = 393,428,084,113.00/718,872.95
  6. Step 6: Final answer
    x = 547,284.59

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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.