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Finding the Fourth Proportional to 257,416.60, 386,124.90 and 239,920.60

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Solution

The fourth proportional to 257,416.60, 386,124.90 and 239,920.60 is: 359,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,416.60 : 386,124.90 = 239,920.60 : x
  2. Step 2: Convert to fraction form
    257,416.60/386,124.90 = 239,920.60/x
  3. Step 3: Cross multiply
    257,416.60x = 386,124.90 × 239,920.60
  4. Step 4: Simplify right side
    257,416.60x = 92,639,317,682.94
  5. Step 5: Solve for x
    x = 92,639,317,682.94/257,416.60
  6. Step 6: Final answer
    x = 359,880.90

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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.