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Finding the Fourth Proportional to 611,319.90, 915,786.96 and 400,318.14

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Solution

The fourth proportional to 611,319.90, 915,786.96 and 400,318.14 is: 599,696.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,319.90 : 915,786.96 = 400,318.14 : x
  2. Step 2: Convert to fraction form
    611,319.90/915,786.96 = 400,318.14/x
  3. Step 3: Cross multiply
    611,319.90x = 915,786.96 × 400,318.14
  4. Step 4: Simplify right side
    611,319.90x = 366,606,132,463.45
  5. Step 5: Solve for x
    x = 366,606,132,463.45/611,319.90
  6. Step 6: Final answer
    x = 599,696.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.