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Finding the Fourth Proportional to 666,534.90, 999,906.04 and 217,151.16

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Solution

The fourth proportional to 666,534.90, 999,906.04 and 217,151.16 is: 325,760.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,534.90 : 999,906.04 = 217,151.16 : x
  2. Step 2: Convert to fraction form
    666,534.90/999,906.04 = 217,151.16/x
  3. Step 3: Cross multiply
    666,534.90x = 999,906.04 × 217,151.16
  4. Step 4: Simplify right side
    666,534.90x = 217,130,756,477.01
  5. Step 5: Solve for x
    x = 217,130,756,477.01/666,534.90
  6. Step 6: Final answer
    x = 325,760.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.