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Finding the Fourth Proportional to 663,137.24, 915,129.40 and 361,331.24

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Solution

The fourth proportional to 663,137.24, 915,129.40 and 361,331.24 is: 498,637.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,137.24 : 915,129.40 = 361,331.24 : x
  2. Step 2: Convert to fraction form
    663,137.24/915,129.40 = 361,331.24/x
  3. Step 3: Cross multiply
    663,137.24x = 915,129.40 × 361,331.24
  4. Step 4: Simplify right side
    663,137.24x = 330,664,835,383.48
  5. Step 5: Solve for x
    x = 330,664,835,383.48/663,137.24
  6. Step 6: Final answer
    x = 498,637.11

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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.