Home / 1,290,285.52-1,780,493.16-717,290.80

Finding the Fourth Proportional to 1,290,285.52, 1,780,493.16 and 717,290.80

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Solution

The fourth proportional to 1,290,285.52, 1,780,493.16 and 717,290.80 is: 989,805.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,285.52 : 1,780,493.16 = 717,290.80 : x
  2. Step 2: Convert to fraction form
    1,290,285.52/1,780,493.16 = 717,290.80/x
  3. Step 3: Cross multiply
    1,290,285.52x = 1,780,493.16 × 717,290.80
  4. Step 4: Simplify right side
    1,290,285.52x = 1,277,131,363,130.93
  5. Step 5: Solve for x
    x = 1,277,131,363,130.93/1,290,285.52
  6. Step 6: Final answer
    x = 989,805.24

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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.