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Finding the Fourth Proportional to 262,456.20, 393,684.30 and 72,916.20

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Solution

The fourth proportional to 262,456.20, 393,684.30 and 72,916.20 is: 109,374.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,456.20 : 393,684.30 = 72,916.20 : x
  2. Step 2: Convert to fraction form
    262,456.20/393,684.30 = 72,916.20/x
  3. Step 3: Cross multiply
    262,456.20x = 393,684.30 × 72,916.20
  4. Step 4: Simplify right side
    262,456.20x = 28,705,963,155.66
  5. Step 5: Solve for x
    x = 28,705,963,155.66/262,456.20
  6. Step 6: Final answer
    x = 109,374.30

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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.