Home / 1,108,831.42-1,530,178.45-643,728.45

Finding the Fourth Proportional to 1,108,831.42, 1,530,178.45 and 643,728.45

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Solution

The fourth proportional to 1,108,831.42, 1,530,178.45 and 643,728.45 is: 888,340.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108,831.42 : 1,530,178.45 = 643,728.45 : x
  2. Step 2: Convert to fraction form
    1,108,831.42/1,530,178.45 = 643,728.45/x
  3. Step 3: Cross multiply
    1,108,831.42x = 1,530,178.45 × 643,728.45
  4. Step 4: Simplify right side
    1,108,831.42x = 985,019,400,535.98
  5. Step 5: Solve for x
    x = 985,019,400,535.98/1,108,831.42
  6. Step 6: Final answer
    x = 888,340.09

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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.