Home / 1,277,100-1,915,650.72-390,636

Finding the Fourth Proportional to 1,277,100, 1,915,650.72 and 390,636

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Solution

The fourth proportional to 1,277,100, 1,915,650.72 and 390,636 is: 585,954.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,100 : 1,915,650.72 = 390,636 : x
  2. Step 2: Convert to fraction form
    1,277,100/1,915,650.72 = 390,636/x
  3. Step 3: Cross multiply
    1,277,100x = 1,915,650.72 × 390,636
  4. Step 4: Simplify right side
    1,277,100x = 748,322,134,657.92
  5. Step 5: Solve for x
    x = 748,322,134,657.92/1,277,100
  6. Step 6: Final answer
    x = 585,954.22

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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.