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Finding the Fourth Proportional to 295,740.80, 443,611.20 and 85,385.60

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Solution

The fourth proportional to 295,740.80, 443,611.20 and 85,385.60 is: 128,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,740.80 : 443,611.20 = 85,385.60 : x
  2. Step 2: Convert to fraction form
    295,740.80/443,611.20 = 85,385.60/x
  3. Step 3: Cross multiply
    295,740.80x = 443,611.20 × 85,385.60
  4. Step 4: Simplify right side
    295,740.80x = 37,878,008,478.72
  5. Step 5: Solve for x
    x = 37,878,008,478.72/295,740.80
  6. Step 6: Final answer
    x = 128,078.40

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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.