Home / 781,820.94-1,078,356.70-717,497.89

Finding the Fourth Proportional to 781,820.94, 1,078,356.70 and 717,497.89

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Solution

The fourth proportional to 781,820.94, 1,078,356.70 and 717,497.89 is: 989,636.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,820.94 : 1,078,356.70 = 717,497.89 : x
  2. Step 2: Convert to fraction form
    781,820.94/1,078,356.70 = 717,497.89/x
  3. Step 3: Cross multiply
    781,820.94x = 1,078,356.70 × 717,497.89
  4. Step 4: Simplify right side
    781,820.94x = 773,718,656,917.36
  5. Step 5: Solve for x
    x = 773,718,656,917.36/781,820.94
  6. Step 6: Final answer
    x = 989,636.65

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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.