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Finding the Fourth Proportional to 666,561.22, 919,831.61 and 380,173.58

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Solution

The fourth proportional to 666,561.22, 919,831.61 and 380,173.58 is: 524,626.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,561.22 : 919,831.61 = 380,173.58 : x
  2. Step 2: Convert to fraction form
    666,561.22/919,831.61 = 380,173.58/x
  3. Step 3: Cross multiply
    666,561.22x = 919,831.61 × 380,173.58
  4. Step 4: Simplify right side
    666,561.22x = 349,695,676,170.86
  5. Step 5: Solve for x
    x = 349,695,676,170.86/666,561.22
  6. Step 6: Final answer
    x = 524,626.49

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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.