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Finding the Fourth Proportional to 1,216,502, 1,678,705.02 and 672,605.12

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Solution

The fourth proportional to 1,216,502, 1,678,705.02 and 672,605.12 is: 928,157.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,502 : 1,678,705.02 = 672,605.12 : x
  2. Step 2: Convert to fraction form
    1,216,502/1,678,705.02 = 672,605.12/x
  3. Step 3: Cross multiply
    1,216,502x = 1,678,705.02 × 672,605.12
  4. Step 4: Simplify right side
    1,216,502x = 1,129,105,591,421.70
  5. Step 5: Solve for x
    x = 1,129,105,591,421.70/1,216,502
  6. Step 6: Final answer
    x = 928,157.61

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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.