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Finding the Fourth Proportional to 666,421.12, 918,704.62 and 475,102.36

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Solution

The fourth proportional to 666,421.12, 918,704.62 and 475,102.36 is: 654,959.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,421.12 : 918,704.62 = 475,102.36 : x
  2. Step 2: Convert to fraction form
    666,421.12/918,704.62 = 475,102.36/x
  3. Step 3: Cross multiply
    666,421.12x = 918,704.62 × 475,102.36
  4. Step 4: Simplify right side
    666,421.12x = 436,478,733,104.90
  5. Step 5: Solve for x
    x = 436,478,733,104.90/666,421.12
  6. Step 6: Final answer
    x = 654,959.33

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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.