Home / 1,222,311.87-1,686,710.39-678,421.17

Finding the Fourth Proportional to 1,222,311.87, 1,686,710.39 and 678,421.17

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Solution

The fourth proportional to 1,222,311.87, 1,686,710.39 and 678,421.17 is: 936,176.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,311.87 : 1,686,710.39 = 678,421.17 : x
  2. Step 2: Convert to fraction form
    1,222,311.87/1,686,710.39 = 678,421.17/x
  3. Step 3: Cross multiply
    1,222,311.87x = 1,686,710.39 × 678,421.17
  4. Step 4: Simplify right side
    1,222,311.87x = 1,144,300,032,842.85
  5. Step 5: Solve for x
    x = 1,144,300,032,842.85/1,222,311.87
  6. Step 6: Final answer
    x = 936,176.81

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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.