Home / 778,615.50-1,074,490.83-420,919.50

Finding the Fourth Proportional to 778,615.50, 1,074,490.83 and 420,919.50

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Solution

The fourth proportional to 778,615.50, 1,074,490.83 and 420,919.50 is: 580,869.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,615.50 : 1,074,490.83 = 420,919.50 : x
  2. Step 2: Convert to fraction form
    778,615.50/1,074,490.83 = 420,919.50/x
  3. Step 3: Cross multiply
    778,615.50x = 1,074,490.83 × 420,919.50
  4. Step 4: Simplify right side
    778,615.50x = 452,274,142,918.19
  5. Step 5: Solve for x
    x = 452,274,142,918.19/778,615.50
  6. Step 6: Final answer
    x = 580,869.69

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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.