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Finding the Fourth Proportional to 656,248.64, 905,623.43 and 354,442.64

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Solution

The fourth proportional to 656,248.64, 905,623.43 and 354,442.64 is: 489,131.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,248.64 : 905,623.43 = 354,442.64 : x
  2. Step 2: Convert to fraction form
    656,248.64/905,623.43 = 354,442.64/x
  3. Step 3: Cross multiply
    656,248.64x = 905,623.43 × 354,442.64
  4. Step 4: Simplify right side
    656,248.64x = 320,991,559,375.06
  5. Step 5: Solve for x
    x = 320,991,559,375.06/656,248.64
  6. Step 6: Final answer
    x = 489,131.01

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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.