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Finding the Fourth Proportional to 666,409.92, 919,417.95 and 379,723.38

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Solution

The fourth proportional to 666,409.92, 919,417.95 and 379,723.38 is: 523,888.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,409.92 : 919,417.95 = 379,723.38 : x
  2. Step 2: Convert to fraction form
    666,409.92/919,417.95 = 379,723.38/x
  3. Step 3: Cross multiply
    666,409.92x = 919,417.95 × 379,723.38
  4. Step 4: Simplify right side
    666,409.92x = 349,124,491,606.67
  5. Step 5: Solve for x
    x = 349,124,491,606.67/666,409.92
  6. Step 6: Final answer
    x = 523,888.50

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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.