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Finding the Fourth Proportional to 656,246.64, 905,620.67 and 354,440.64

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Solution

The fourth proportional to 656,246.64, 905,620.67 and 354,440.64 is: 489,128.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,246.64 : 905,620.67 = 354,440.64 : x
  2. Step 2: Convert to fraction form
    656,246.64/905,620.67 = 354,440.64/x
  3. Step 3: Cross multiply
    656,246.64x = 905,620.67 × 354,440.64
  4. Step 4: Simplify right side
    656,246.64x = 320,988,772,825.06
  5. Step 5: Solve for x
    x = 320,988,772,825.06/656,246.64
  6. Step 6: Final answer
    x = 489,128.25

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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.