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Finding the Fourth Proportional to 420,897.36, 580,823.64 and 251,043.60

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Solution

The fourth proportional to 420,897.36, 580,823.64 and 251,043.60 is: 346,431.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,897.36 : 580,823.64 = 251,043.60 : x
  2. Step 2: Convert to fraction form
    420,897.36/580,823.64 = 251,043.60/x
  3. Step 3: Cross multiply
    420,897.36x = 580,823.64 × 251,043.60
  4. Step 4: Simplify right side
    420,897.36x = 145,812,057,550.70
  5. Step 5: Solve for x
    x = 145,812,057,550.70/420,897.36
  6. Step 6: Final answer
    x = 346,431.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.