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Finding the Fourth Proportional to 318,655.25, 477,982.88 and 118,991.22

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Solution

The fourth proportional to 318,655.25, 477,982.88 and 118,991.22 is: 178,486.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,655.25 : 477,982.88 = 118,991.22 : x
  2. Step 2: Convert to fraction form
    318,655.25/477,982.88 = 118,991.22/x
  3. Step 3: Cross multiply
    318,655.25x = 477,982.88 × 118,991.22
  4. Step 4: Simplify right side
    318,655.25x = 56,875,766,030.31
  5. Step 5: Solve for x
    x = 56,875,766,030.31/318,655.25
  6. Step 6: Final answer
    x = 178,486.83

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Similar ratio
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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.