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Finding the Fourth Proportional to 545,221.20, 817,831.80 and 171,243.60

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Solution

The fourth proportional to 545,221.20, 817,831.80 and 171,243.60 is: 256,865.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,221.20 : 817,831.80 = 171,243.60 : x
  2. Step 2: Convert to fraction form
    545,221.20/817,831.80 = 171,243.60/x
  3. Step 3: Cross multiply
    545,221.20x = 817,831.80 × 171,243.60
  4. Step 4: Simplify right side
    545,221.20x = 140,048,461,626.48
  5. Step 5: Solve for x
    x = 140,048,461,626.48/545,221.20
  6. Step 6: Final answer
    x = 256,865.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.