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Finding the Fourth Proportional to 425,314.80, 637,972.20 and 408,985.20

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Solution

The fourth proportional to 425,314.80, 637,972.20 and 408,985.20 is: 613,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,314.80 : 637,972.20 = 408,985.20 : x
  2. Step 2: Convert to fraction form
    425,314.80/637,972.20 = 408,985.20/x
  3. Step 3: Cross multiply
    425,314.80x = 637,972.20 × 408,985.20
  4. Step 4: Simplify right side
    425,314.80x = 260,921,187,811.44
  5. Step 5: Solve for x
    x = 260,921,187,811.44/425,314.80
  6. Step 6: Final answer
    x = 613,477.80

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1.5x scale

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.