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Finding the Fourth Proportional to 318,667.96, 477,998.70 and 82,009.72

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Solution

The fourth proportional to 318,667.96, 477,998.70 and 82,009.72 is: 123,013.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,667.96 : 477,998.70 = 82,009.72 : x
  2. Step 2: Convert to fraction form
    318,667.96/477,998.70 = 82,009.72/x
  3. Step 3: Cross multiply
    318,667.96x = 477,998.70 × 82,009.72
  4. Step 4: Simplify right side
    318,667.96x = 39,200,539,547.36
  5. Step 5: Solve for x
    x = 39,200,539,547.36/318,667.96
  6. Step 6: Final answer
    x = 123,013.75

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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.