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Finding the Fourth Proportional to 393,886.20, 591,120.90 and 260,722.20

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Solution

The fourth proportional to 393,886.20, 591,120.90 and 260,722.20 is: 391,276.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,886.20 : 591,120.90 = 260,722.20 : x
  2. Step 2: Convert to fraction form
    393,886.20/591,120.90 = 260,722.20/x
  3. Step 3: Cross multiply
    393,886.20x = 591,120.90 × 260,722.20
  4. Step 4: Simplify right side
    393,886.20x = 154,118,341,513.98
  5. Step 5: Solve for x
    x = 154,118,341,513.98/393,886.20
  6. Step 6: Final answer
    x = 391,276.32

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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.