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Finding the Fourth Proportional to 663,129.44, 915,118.63 and 361,323.44

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Solution

The fourth proportional to 663,129.44, 915,118.63 and 361,323.44 is: 498,626.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,129.44 : 915,118.63 = 361,323.44 : x
  2. Step 2: Convert to fraction form
    663,129.44/915,118.63 = 361,323.44/x
  3. Step 3: Cross multiply
    663,129.44x = 915,118.63 × 361,323.44
  4. Step 4: Simplify right side
    663,129.44x = 330,653,811,399.69
  5. Step 5: Solve for x
    x = 330,653,811,399.69/663,129.44
  6. Step 6: Final answer
    x = 498,626.35

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1.5x scale

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.