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Finding the Fourth Proportional to 666,107.99, 919,173.49 and 375,703.55

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Solution

The fourth proportional to 666,107.99, 919,173.49 and 375,703.55 is: 518,439.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,107.99 : 919,173.49 = 375,703.55 : x
  2. Step 2: Convert to fraction form
    666,107.99/919,173.49 = 375,703.55/x
  3. Step 3: Cross multiply
    666,107.99x = 919,173.49 × 375,703.55
  4. Step 4: Simplify right side
    666,107.99x = 345,336,737,723.76
  5. Step 5: Solve for x
    x = 345,336,737,723.76/666,107.99
  6. Step 6: Final answer
    x = 518,439.57

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1.5x scale

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.