Home / 787,831.22-1,087,709.88-642,983.01

Finding the Fourth Proportional to 787,831.22, 1,087,709.88 and 642,983.01

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Solution

The fourth proportional to 787,831.22, 1,087,709.88 and 642,983.01 is: 887,726.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,831.22 : 1,087,709.88 = 642,983.01 : x
  2. Step 2: Convert to fraction form
    787,831.22/1,087,709.88 = 642,983.01/x
  3. Step 3: Cross multiply
    787,831.22x = 1,087,709.88 × 642,983.01
  4. Step 4: Simplify right side
    787,831.22x = 699,378,972,649.14
  5. Step 5: Solve for x
    x = 699,378,972,649.14/787,831.22
  6. Step 6: Final answer
    x = 887,726.91

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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.