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Finding the Fourth Proportional to 257,520.40, 386,280.60 and 219,466.60

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Solution

The fourth proportional to 257,520.40, 386,280.60 and 219,466.60 is: 329,199.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,520.40 : 386,280.60 = 219,466.60 : x
  2. Step 2: Convert to fraction form
    257,520.40/386,280.60 = 219,466.60/x
  3. Step 3: Cross multiply
    257,520.40x = 386,280.60 × 219,466.60
  4. Step 4: Simplify right side
    257,520.40x = 84,775,689,927.96
  5. Step 5: Solve for x
    x = 84,775,689,927.96/257,520.40
  6. Step 6: Final answer
    x = 329,199.90

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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.