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Finding the Fourth Proportional to 666,127.72, 999,203.91 and 216,847

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Solution

The fourth proportional to 666,127.72, 999,203.91 and 216,847 is: 325,274.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,127.72 : 999,203.91 = 216,847 : x
  2. Step 2: Convert to fraction form
    666,127.72/999,203.91 = 216,847/x
  3. Step 3: Cross multiply
    666,127.72x = 999,203.91 × 216,847
  4. Step 4: Simplify right side
    666,127.72x = 216,674,370,271.77
  5. Step 5: Solve for x
    x = 216,674,370,271.77/666,127.72
  6. Step 6: Final answer
    x = 325,274.51

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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.