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Finding the Fourth Proportional to 404,731.16, 606,990.92 and 120,345.12

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Solution

The fourth proportional to 404,731.16, 606,990.92 and 120,345.12 is: 180,486.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,731.16 : 606,990.92 = 120,345.12 : x
  2. Step 2: Convert to fraction form
    404,731.16/606,990.92 = 120,345.12/x
  3. Step 3: Cross multiply
    404,731.16x = 606,990.92 × 120,345.12
  4. Step 4: Simplify right side
    404,731.16x = 73,048,395,106.31
  5. Step 5: Solve for x
    x = 73,048,395,106.31/404,731.16
  6. Step 6: Final answer
    x = 180,486.21

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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.