Home / 781,079.25-1,077,418.05-515,866.49

Finding the Fourth Proportional to 781,079.25, 1,077,418.05 and 515,866.49

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Solution

The fourth proportional to 781,079.25, 1,077,418.05 and 515,866.49 is: 711,584.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,079.25 : 1,077,418.05 = 515,866.49 : x
  2. Step 2: Convert to fraction form
    781,079.25/1,077,418.05 = 515,866.49/x
  3. Step 3: Cross multiply
    781,079.25x = 1,077,418.05 × 515,866.49
  4. Step 4: Simplify right side
    781,079.25x = 555,803,870,276.90
  5. Step 5: Solve for x
    x = 555,803,870,276.90/781,079.25
  6. Step 6: Final answer
    x = 711,584.47

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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.