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Finding the Fourth Proportional to 318,458.61, 439,290.36 and 199,019.25

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Solution

The fourth proportional to 318,458.61, 439,290.36 and 199,019.25 is: 274,532.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,458.61 : 439,290.36 = 199,019.25 : x
  2. Step 2: Convert to fraction form
    318,458.61/439,290.36 = 199,019.25/x
  3. Step 3: Cross multiply
    318,458.61x = 439,290.36 × 199,019.25
  4. Step 4: Simplify right side
    318,458.61x = 87,427,237,979.43
  5. Step 5: Solve for x
    x = 87,427,237,979.43/318,458.61
  6. Step 6: Final answer
    x = 274,532.50

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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.