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Finding the Fourth Proportional to 672,908.12, 1,009,463.16 and 217,347.21

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Solution

The fourth proportional to 672,908.12, 1,009,463.16 and 217,347.21 is: 326,053.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,908.12 : 1,009,463.16 = 217,347.21 : x
  2. Step 2: Convert to fraction form
    672,908.12/1,009,463.16 = 217,347.21/x
  3. Step 3: Cross multiply
    672,908.12x = 1,009,463.16 × 217,347.21
  4. Step 4: Simplify right side
    672,908.12x = 219,404,001,423.78
  5. Step 5: Solve for x
    x = 219,404,001,423.78/672,908.12
  6. Step 6: Final answer
    x = 326,053.43

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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.