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Finding the Fourth Proportional to 520,909.76, 780,831.81 and 352,447.88

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Solution

The fourth proportional to 520,909.76, 780,831.81 and 352,447.88 is: 528,311.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,909.76 : 780,831.81 = 352,447.88 : x
  2. Step 2: Convert to fraction form
    520,909.76/780,831.81 = 352,447.88/x
  3. Step 3: Cross multiply
    520,909.76x = 780,831.81 × 352,447.88
  4. Step 4: Simplify right side
    520,909.76x = 275,202,512,166.90
  5. Step 5: Solve for x
    x = 275,202,512,166.90/520,909.76
  6. Step 6: Final answer
    x = 528,311.30

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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.