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Finding the Fourth Proportional to 397,145.40, 596,178.90 and 239,551.80

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Solution

The fourth proportional to 397,145.40, 596,178.90 and 239,551.80 is: 359,605.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,145.40 : 596,178.90 = 239,551.80 : x
  2. Step 2: Convert to fraction form
    397,145.40/596,178.90 = 239,551.80/x
  3. Step 3: Cross multiply
    397,145.40x = 596,178.90 × 239,551.80
  4. Step 4: Simplify right side
    397,145.40x = 142,815,728,617.02
  5. Step 5: Solve for x
    x = 142,815,728,617.02/397,145.40
  6. Step 6: Final answer
    x = 359,605.65

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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.