Home / 1,290,130.50-1,780,295.85-717,149.46

Finding the Fourth Proportional to 1,290,130.50, 1,780,295.85 and 717,149.46

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Solution

The fourth proportional to 1,290,130.50, 1,780,295.85 and 717,149.46 is: 989,619.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,130.50 : 1,780,295.85 = 717,149.46 : x
  2. Step 2: Convert to fraction form
    1,290,130.50/1,780,295.85 = 717,149.46/x
  3. Step 3: Cross multiply
    1,290,130.50x = 1,780,295.85 × 717,149.46
  4. Step 4: Simplify right side
    1,290,130.50x = 1,276,738,207,467.74
  5. Step 5: Solve for x
    x = 1,276,738,207,467.74/1,290,130.50
  6. Step 6: Final answer
    x = 989,619.43

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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.