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Finding the Fourth Proportional to 1,320,144.04, 1,821,831.78 and 716,530.60

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Solution

The fourth proportional to 1,320,144.04, 1,821,831.78 and 716,530.60 is: 988,830.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,144.04 : 1,821,831.78 = 716,530.60 : x
  2. Step 2: Convert to fraction form
    1,320,144.04/1,821,831.78 = 716,530.60/x
  3. Step 3: Cross multiply
    1,320,144.04x = 1,821,831.78 × 716,530.60
  4. Step 4: Simplify right side
    1,320,144.04x = 1,305,398,218,422.47
  5. Step 5: Solve for x
    x = 1,305,398,218,422.47/1,320,144.04
  6. Step 6: Final answer
    x = 988,830.14

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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.