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Finding the Fourth Proportional to 613,387.20, 920,117.54 and 192,663.06

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Solution

The fourth proportional to 613,387.20, 920,117.54 and 192,663.06 is: 289,006.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,387.20 : 920,117.54 = 192,663.06 : x
  2. Step 2: Convert to fraction form
    613,387.20/920,117.54 = 192,663.06/x
  3. Step 3: Cross multiply
    613,387.20x = 920,117.54 × 192,663.06
  4. Step 4: Simplify right side
    613,387.20x = 177,272,660,816.07
  5. Step 5: Solve for x
    x = 177,272,660,816.07/613,387.20
  6. Step 6: Final answer
    x = 289,006.13

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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.