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Finding the Fourth Proportional to 307,355, 424,153.20 and 173,219

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Solution

The fourth proportional to 307,355, 424,153.20 and 173,219 is: 239,044.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,355 : 424,153.20 = 173,219 : x
  2. Step 2: Convert to fraction form
    307,355/424,153.20 = 173,219/x
  3. Step 3: Cross multiply
    307,355x = 424,153.20 × 173,219
  4. Step 4: Simplify right side
    307,355x = 73,471,393,150.80
  5. Step 5: Solve for x
    x = 73,471,393,150.80/307,355
  6. Step 6: Final answer
    x = 239,044.08

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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.