Home / 1,225,211.78-1,690,544.49-715,815.74

Finding the Fourth Proportional to 1,225,211.78, 1,690,544.49 and 715,815.74

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Solution

The fourth proportional to 1,225,211.78, 1,690,544.49 and 715,815.74 is: 987,680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,211.78 : 1,690,544.49 = 715,815.74 : x
  2. Step 2: Convert to fraction form
    1,225,211.78/1,690,544.49 = 715,815.74/x
  3. Step 3: Cross multiply
    1,225,211.78x = 1,690,544.49 × 715,815.74
  4. Step 4: Simplify right side
    1,225,211.78x = 1,210,118,355,112.27
  5. Step 5: Solve for x
    x = 1,210,118,355,112.27/1,225,211.78
  6. Step 6: Final answer
    x = 987,680.97

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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.