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Finding the Fourth Proportional to 666,612.86, 919,925.16 and 376,285.54

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Solution

The fourth proportional to 666,612.86, 919,925.16 and 376,285.54 is: 519,273.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,612.86 : 919,925.16 = 376,285.54 : x
  2. Step 2: Convert to fraction form
    666,612.86/919,925.16 = 376,285.54/x
  3. Step 3: Cross multiply
    666,612.86x = 919,925.16 × 376,285.54
  4. Step 4: Simplify right side
    666,612.86x = 346,154,532,575.10
  5. Step 5: Solve for x
    x = 346,154,532,575.10/666,612.86
  6. Step 6: Final answer
    x = 519,273.71

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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.