Home / 809,975.70-1,214,963.55-390,071.70

Finding the Fourth Proportional to 809,975.70, 1,214,963.55 and 390,071.70

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Solution

The fourth proportional to 809,975.70, 1,214,963.55 and 390,071.70 is: 585,107.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,975.70 : 1,214,963.55 = 390,071.70 : x
  2. Step 2: Convert to fraction form
    809,975.70/1,214,963.55 = 390,071.70/x
  3. Step 3: Cross multiply
    809,975.70x = 1,214,963.55 × 390,071.70
  4. Step 4: Simplify right side
    809,975.70x = 473,922,897,386.54
  5. Step 5: Solve for x
    x = 473,922,897,386.54/809,975.70
  6. Step 6: Final answer
    x = 585,107.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.