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Finding the Fourth Proportional to 666,420.77, 918,704.15 and 475,102.01

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Solution

The fourth proportional to 666,420.77, 918,704.15 and 475,102.01 is: 654,958.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,420.77 : 918,704.15 = 475,102.01 : x
  2. Step 2: Convert to fraction form
    666,420.77/918,704.15 = 475,102.01/x
  3. Step 3: Cross multiply
    666,420.77x = 918,704.15 × 475,102.01
  4. Step 4: Simplify right side
    666,420.77x = 436,478,189,923.85
  5. Step 5: Solve for x
    x = 436,478,189,923.85/666,420.77
  6. Step 6: Final answer
    x = 654,958.86

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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.