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Finding the Fourth Proportional to 385,311.60, 577,189.80 and 267,116.40

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Solution

The fourth proportional to 385,311.60, 577,189.80 and 267,116.40 is: 400,135.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,311.60 : 577,189.80 = 267,116.40 : x
  2. Step 2: Convert to fraction form
    385,311.60/577,189.80 = 267,116.40/x
  3. Step 3: Cross multiply
    385,311.60x = 577,189.80 × 267,116.40
  4. Step 4: Simplify right side
    385,311.60x = 154,176,861,492.72
  5. Step 5: Solve for x
    x = 154,176,861,492.72/385,311.60
  6. Step 6: Final answer
    x = 400,135.53

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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.