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Finding the Fourth Proportional to 425,321.60, 637,399.20 and 346,589.60

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Solution

The fourth proportional to 425,321.60, 637,399.20 and 346,589.60 is: 519,409.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,321.60 : 637,399.20 = 346,589.60 : x
  2. Step 2: Convert to fraction form
    425,321.60/637,399.20 = 346,589.60/x
  3. Step 3: Cross multiply
    425,321.60x = 637,399.20 × 346,589.60
  4. Step 4: Simplify right side
    425,321.60x = 220,915,933,768.32
  5. Step 5: Solve for x
    x = 220,915,933,768.32/425,321.60
  6. Step 6: Final answer
    x = 519,409.16

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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.