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Finding the Fourth Proportional to 318,654.25, 477,981.38 and 118,990.22

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Solution

The fourth proportional to 318,654.25, 477,981.38 and 118,990.22 is: 178,485.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,654.25 : 477,981.38 = 118,990.22 : x
  2. Step 2: Convert to fraction form
    318,654.25/477,981.38 = 118,990.22/x
  3. Step 3: Cross multiply
    318,654.25x = 477,981.38 × 118,990.22
  4. Step 4: Simplify right side
    318,654.25x = 56,875,111,054.53
  5. Step 5: Solve for x
    x = 56,875,111,054.53/318,654.25
  6. Step 6: Final answer
    x = 178,485.34

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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.