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Finding the Fourth Proportional to 718,895.04, 992,078.45 and 396,605.01

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Solution

The fourth proportional to 718,895.04, 992,078.45 and 396,605.01 is: 547,316.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,895.04 : 992,078.45 = 396,605.01 : x
  2. Step 2: Convert to fraction form
    718,895.04/992,078.45 = 396,605.01/x
  3. Step 3: Cross multiply
    718,895.04x = 992,078.45 × 396,605.01
  4. Step 4: Simplify right side
    718,895.04x = 393,463,283,583.04
  5. Step 5: Solve for x
    x = 393,463,283,583.04/718,895.04
  6. Step 6: Final answer
    x = 547,316.73

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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.