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Finding the Fourth Proportional to 425,321.60, 637,828.80 and 214,889.60

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Solution

The fourth proportional to 425,321.60, 637,828.80 and 214,889.60 is: 322,256.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,321.60 : 637,828.80 = 214,889.60 : x
  2. Step 2: Convert to fraction form
    425,321.60/637,828.80 = 214,889.60/x
  3. Step 3: Cross multiply
    425,321.60x = 637,828.80 × 214,889.60
  4. Step 4: Simplify right side
    425,321.60x = 137,062,775,700.48
  5. Step 5: Solve for x
    x = 137,062,775,700.48/425,321.60
  6. Step 6: Final answer
    x = 322,256.80

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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.