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Finding the Fourth Proportional to 425,311.80, 637,967.70 and 399,067.80

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Solution

The fourth proportional to 425,311.80, 637,967.70 and 399,067.80 is: 598,601.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,311.80 : 637,967.70 = 399,067.80 : x
  2. Step 2: Convert to fraction form
    425,311.80/637,967.70 = 399,067.80/x
  3. Step 3: Cross multiply
    425,311.80x = 637,967.70 × 399,067.80
  4. Step 4: Simplify right side
    425,311.80x = 254,592,366,510.06
  5. Step 5: Solve for x
    x = 254,592,366,510.06/425,311.80
  6. Step 6: Final answer
    x = 598,601.70

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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.