Home / 1,290,287.52-1,780,495.92-717,292.80

Finding the Fourth Proportional to 1,290,287.52, 1,780,495.92 and 717,292.80

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Solution

The fourth proportional to 1,290,287.52, 1,780,495.92 and 717,292.80 is: 989,808.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,287.52 : 1,780,495.92 = 717,292.80 : x
  2. Step 2: Convert to fraction form
    1,290,287.52/1,780,495.92 = 717,292.80/x
  3. Step 3: Cross multiply
    1,290,287.52x = 1,780,495.92 × 717,292.80
  4. Step 4: Simplify right side
    1,290,287.52x = 1,277,136,903,845.38
  5. Step 5: Solve for x
    x = 1,277,136,903,845.38/1,290,287.52
  6. Step 6: Final answer
    x = 989,808.00

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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.