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Finding the Fourth Proportional to 318,683.80, 478,047.30 and 108,337.60

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Solution

The fourth proportional to 318,683.80, 478,047.30 and 108,337.60 is: 162,513.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,683.80 : 478,047.30 = 108,337.60 : x
  2. Step 2: Convert to fraction form
    318,683.80/478,047.30 = 108,337.60/x
  3. Step 3: Cross multiply
    318,683.80x = 478,047.30 × 108,337.60
  4. Step 4: Simplify right side
    318,683.80x = 51,790,497,168.48
  5. Step 5: Solve for x
    x = 51,790,497,168.48/318,683.80
  6. Step 6: Final answer
    x = 162,513.74

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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.