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Finding the Fourth Proportional to 611,287.60, 915,738.56 and 400,285.84

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Solution

The fourth proportional to 611,287.60, 915,738.56 and 400,285.84 is: 599,647.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,287.60 : 915,738.56 = 400,285.84 : x
  2. Step 2: Convert to fraction form
    611,287.60/915,738.56 = 400,285.84/x
  3. Step 3: Cross multiply
    611,287.60x = 915,738.56 × 400,285.84
  4. Step 4: Simplify right side
    611,287.60x = 366,557,174,131.30
  5. Step 5: Solve for x
    x = 366,557,174,131.30/611,287.60
  6. Step 6: Final answer
    x = 599,647.66

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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.