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Finding the Fourth Proportional to 328,640.72, 492,961.08 and 79,322.72

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Solution

The fourth proportional to 328,640.72, 492,961.08 and 79,322.72 is: 118,984.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,640.72 : 492,961.08 = 79,322.72 : x
  2. Step 2: Convert to fraction form
    328,640.72/492,961.08 = 79,322.72/x
  3. Step 3: Cross multiply
    328,640.72x = 492,961.08 × 79,322.72
  4. Step 4: Simplify right side
    328,640.72x = 39,103,012,381.11
  5. Step 5: Solve for x
    x = 39,103,012,381.11/328,640.72
  6. Step 6: Final answer
    x = 118,984.08

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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.