Home / 320,430.10-479,989.05-162,747.40

Finding the Fourth Proportional to 320,430.10, 479,989.05 and 162,747.40

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Solution

The fourth proportional to 320,430.10, 479,989.05 and 162,747.40 is: 243,787.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,430.10 : 479,989.05 = 162,747.40 : x
  2. Step 2: Convert to fraction form
    320,430.10/479,989.05 = 162,747.40/x
  3. Step 3: Cross multiply
    320,430.10x = 479,989.05 × 162,747.40
  4. Step 4: Simplify right side
    320,430.10x = 78,116,969,915.97
  5. Step 5: Solve for x
    x = 78,116,969,915.97/320,430.10
  6. Step 6: Final answer
    x = 243,787.86

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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.