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Finding the Fourth Proportional to 279,985.73, 420,175.43 and 253,216.85

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Solution

The fourth proportional to 279,985.73, 420,175.43 and 253,216.85 is: 380,003.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,985.73 : 420,175.43 = 253,216.85 : x
  2. Step 2: Convert to fraction form
    279,985.73/420,175.43 = 253,216.85/x
  3. Step 3: Cross multiply
    279,985.73x = 420,175.43 × 253,216.85
  4. Step 4: Simplify right side
    279,985.73x = 106,395,495,465.03
  5. Step 5: Solve for x
    x = 106,395,495,465.03/279,985.73
  6. Step 6: Final answer
    x = 380,003.29

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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.