Home / 781,655.89-1,077,828.54-509,218.56

Finding the Fourth Proportional to 781,655.89, 1,077,828.54 and 509,218.56

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Solution

The fourth proportional to 781,655.89, 1,077,828.54 and 509,218.56 is: 702,163.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,655.89 : 1,077,828.54 = 509,218.56 : x
  2. Step 2: Convert to fraction form
    781,655.89/1,077,828.54 = 509,218.56/x
  3. Step 3: Cross multiply
    781,655.89x = 1,077,828.54 × 509,218.56
  4. Step 4: Simplify right side
    781,655.89x = 548,850,297,065.70
  5. Step 5: Solve for x
    x = 548,850,297,065.70/781,655.89
  6. Step 6: Final answer
    x = 702,163.58

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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.