Home / 1,222,281.87-1,686,612.18-678,440.58

Finding the Fourth Proportional to 1,222,281.87, 1,686,612.18 and 678,440.58

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Solution

The fourth proportional to 1,222,281.87, 1,686,612.18 and 678,440.58 is: 936,172.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,281.87 : 1,686,612.18 = 678,440.58 : x
  2. Step 2: Convert to fraction form
    1,222,281.87/1,686,612.18 = 678,440.58/x
  3. Step 3: Cross multiply
    1,222,281.87x = 1,686,612.18 × 678,440.58
  4. Step 4: Simplify right side
    1,222,281.87x = 1,144,266,145,634.26
  5. Step 5: Solve for x
    x = 1,144,266,145,634.26/1,222,281.87
  6. Step 6: Final answer
    x = 936,172.07

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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.