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Finding the Fourth Proportional to 309,852.60, 427,499.12 and 173,866.56

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Solution

The fourth proportional to 309,852.60, 427,499.12 and 173,866.56 is: 239,881.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,852.60 : 427,499.12 = 173,866.56 : x
  2. Step 2: Convert to fraction form
    309,852.60/427,499.12 = 173,866.56/x
  3. Step 3: Cross multiply
    309,852.60x = 427,499.12 × 173,866.56
  4. Step 4: Simplify right side
    309,852.60x = 74,327,801,397.43
  5. Step 5: Solve for x
    x = 74,327,801,397.43/309,852.60
  6. Step 6: Final answer
    x = 239,881.16

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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.