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Finding the Fourth Proportional to 656,209.32, 905,568.84 and 354,403.32

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Solution

The fourth proportional to 656,209.32, 905,568.84 and 354,403.32 is: 489,076.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,209.32 : 905,568.84 = 354,403.32 : x
  2. Step 2: Convert to fraction form
    656,209.32/905,568.84 = 354,403.32/x
  3. Step 3: Cross multiply
    656,209.32x = 905,568.84 × 354,403.32
  4. Step 4: Simplify right side
    656,209.32x = 320,936,603,384.55
  5. Step 5: Solve for x
    x = 320,936,603,384.55/656,209.32
  6. Step 6: Final answer
    x = 489,076.57

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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.