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Finding the Fourth Proportional to 665,777.88, 918,707.46 and 379,280.88

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Solution

The fourth proportional to 665,777.88, 918,707.46 and 379,280.88 is: 523,370.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,777.88 : 918,707.46 = 379,280.88 : x
  2. Step 2: Convert to fraction form
    665,777.88/918,707.46 = 379,280.88/x
  3. Step 3: Cross multiply
    665,777.88x = 918,707.46 × 379,280.88
  4. Step 4: Simplify right side
    665,777.88x = 348,448,173,891.37
  5. Step 5: Solve for x
    x = 348,448,173,891.37/665,777.88
  6. Step 6: Final answer
    x = 523,370.01

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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.