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Finding the Fourth Proportional to 611,311.39, 915,774.22 and 400,309.63

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Solution

The fourth proportional to 611,311.39, 915,774.22 and 400,309.63 is: 599,683.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,311.39 : 915,774.22 = 400,309.63 : x
  2. Step 2: Convert to fraction form
    611,311.39/915,774.22 = 400,309.63/x
  3. Step 3: Cross multiply
    611,311.39x = 915,774.22 × 400,309.63
  4. Step 4: Simplify right side
    611,311.39x = 366,593,232,591.32
  5. Step 5: Solve for x
    x = 366,593,232,591.32/611,311.39
  6. Step 6: Final answer
    x = 599,683.31

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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.