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Finding the Fourth Proportional to 437,653.80, 656,739.90 and 319,026.60

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Solution

The fourth proportional to 437,653.80, 656,739.90 and 319,026.60 is: 478,728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,653.80 : 656,739.90 = 319,026.60 : x
  2. Step 2: Convert to fraction form
    437,653.80/656,739.90 = 319,026.60/x
  3. Step 3: Cross multiply
    437,653.80x = 656,739.90 × 319,026.60
  4. Step 4: Simplify right side
    437,653.80x = 209,517,497,381.34
  5. Step 5: Solve for x
    x = 209,517,497,381.34/437,653.80
  6. Step 6: Final answer
    x = 478,728.84

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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.