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Finding the Fourth Proportional to 328,281.48, 492,422.22 and 78,963.48

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Solution

The fourth proportional to 328,281.48, 492,422.22 and 78,963.48 is: 118,445.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,281.48 : 492,422.22 = 78,963.48 : x
  2. Step 2: Convert to fraction form
    328,281.48/492,422.22 = 78,963.48/x
  3. Step 3: Cross multiply
    328,281.48x = 492,422.22 × 78,963.48
  4. Step 4: Simplify right side
    328,281.48x = 38,883,372,120.53
  5. Step 5: Solve for x
    x = 38,883,372,120.53/328,281.48
  6. Step 6: Final answer
    x = 118,445.22

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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.