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Finding the Fourth Proportional to 1,216,503, 1,678,706.40 and 672,606.12

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Solution

The fourth proportional to 1,216,503, 1,678,706.40 and 672,606.12 is: 928,158.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,503 : 1,678,706.40 = 672,606.12 : x
  2. Step 2: Convert to fraction form
    1,216,503/1,678,706.40 = 672,606.12/x
  3. Step 3: Cross multiply
    1,216,503x = 1,678,706.40 × 672,606.12
  4. Step 4: Simplify right side
    1,216,503x = 1,129,108,198,323.17
  5. Step 5: Solve for x
    x = 1,129,108,198,323.17/1,216,503
  6. Step 6: Final answer
    x = 928,158.99

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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.