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Finding the Fourth Proportional to 666,509.28, 918,825.84 and 475,190.64

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Solution

The fourth proportional to 666,509.28, 918,825.84 and 475,190.64 is: 655,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,509.28 : 918,825.84 = 475,190.64 : x
  2. Step 2: Convert to fraction form
    666,509.28/918,825.84 = 475,190.64/x
  3. Step 3: Cross multiply
    666,509.28x = 918,825.84 × 475,190.64
  4. Step 4: Simplify right side
    666,509.28x = 436,617,438,958.14
  5. Step 5: Solve for x
    x = 436,617,438,958.14/666,509.28
  6. Step 6: Final answer
    x = 655,080.81

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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.