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Finding the Fourth Proportional to 309,648.40, 427,354.34 and 182,335.84

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Solution

The fourth proportional to 309,648.40, 427,354.34 and 182,335.84 is: 251,646.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,648.40 : 427,354.34 = 182,335.84 : x
  2. Step 2: Convert to fraction form
    309,648.40/427,354.34 = 182,335.84/x
  3. Step 3: Cross multiply
    309,648.40x = 427,354.34 × 182,335.84
  4. Step 4: Simplify right side
    309,648.40x = 77,922,012,561.55
  5. Step 5: Solve for x
    x = 77,922,012,561.55/309,648.40
  6. Step 6: Final answer
    x = 251,646.75

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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.