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Finding the Fourth Proportional to 611,328.96, 915,800.46 and 400,327.20

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Solution

The fourth proportional to 611,328.96, 915,800.46 and 400,327.20 is: 599,709.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,328.96 : 915,800.46 = 400,327.20 : x
  2. Step 2: Convert to fraction form
    611,328.96/915,800.46 = 400,327.20/x
  3. Step 3: Cross multiply
    611,328.96x = 915,800.46 × 400,327.20
  4. Step 4: Simplify right side
    611,328.96x = 366,619,833,910.51
  5. Step 5: Solve for x
    x = 366,619,833,910.51/611,328.96
  6. Step 6: Final answer
    x = 599,709.58

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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.