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Finding the Fourth Proportional to 478,476.42, 660,393 and 274,665.06

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Solution

The fourth proportional to 478,476.42, 660,393 and 274,665.06 is: 379,092.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,476.42 : 660,393 = 274,665.06 : x
  2. Step 2: Convert to fraction form
    478,476.42/660,393 = 274,665.06/x
  3. Step 3: Cross multiply
    478,476.42x = 660,393 × 274,665.06
  4. Step 4: Simplify right side
    478,476.42x = 181,386,882,968.58
  5. Step 5: Solve for x
    x = 181,386,882,968.58/478,476.42
  6. Step 6: Final answer
    x = 379,092.63

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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.