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Finding the Fourth Proportional to 478,356.86, 660,160.82 and 274,406.28

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Solution

The fourth proportional to 478,356.86, 660,160.82 and 274,406.28 is: 378,696.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,356.86 : 660,160.82 = 274,406.28 : x
  2. Step 2: Convert to fraction form
    478,356.86/660,160.82 = 274,406.28/x
  3. Step 3: Cross multiply
    478,356.86x = 660,160.82 × 274,406.28
  4. Step 4: Simplify right side
    478,356.86x = 181,152,274,817.95
  5. Step 5: Solve for x
    x = 181,152,274,817.95/478,356.86
  6. Step 6: Final answer
    x = 378,696.93

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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.