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Finding the Fourth Proportional to 387,793.60, 581,690.40 and 256,465.60

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Solution

The fourth proportional to 387,793.60, 581,690.40 and 256,465.60 is: 384,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,793.60 : 581,690.40 = 256,465.60 : x
  2. Step 2: Convert to fraction form
    387,793.60/581,690.40 = 256,465.60/x
  3. Step 3: Cross multiply
    387,793.60x = 581,690.40 × 256,465.60
  4. Step 4: Simplify right side
    387,793.60x = 149,183,577,450.24
  5. Step 5: Solve for x
    x = 149,183,577,450.24/387,793.60
  6. Step 6: Final answer
    x = 384,698.40

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Similar ratio
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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.