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Finding the Fourth Proportional to 422,801.10, 583,492.50 and 279,309.60

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Solution

The fourth proportional to 422,801.10, 583,492.50 and 279,309.60 is: 385,465.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,801.10 : 583,492.50 = 279,309.60 : x
  2. Step 2: Convert to fraction form
    422,801.10/583,492.50 = 279,309.60/x
  3. Step 3: Cross multiply
    422,801.10x = 583,492.50 × 279,309.60
  4. Step 4: Simplify right side
    422,801.10x = 162,975,056,778
  5. Step 5: Solve for x
    x = 162,975,056,778/422,801.10
  6. Step 6: Final answer
    x = 385,465.07

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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.