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Finding the Fourth Proportional to 408,908.02, 613,460.40 and 172,318.36

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Solution

The fourth proportional to 408,908.02, 613,460.40 and 172,318.36 is: 258,518.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,908.02 : 613,460.40 = 172,318.36 : x
  2. Step 2: Convert to fraction form
    408,908.02/613,460.40 = 172,318.36/x
  3. Step 3: Cross multiply
    408,908.02x = 613,460.40 × 172,318.36
  4. Step 4: Simplify right side
    408,908.02x = 105,710,490,052.94
  5. Step 5: Solve for x
    x = 105,710,490,052.94/408,908.02
  6. Step 6: Final answer
    x = 258,518.99

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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.