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Finding the Fourth Proportional to 389,416.30, 584,124.45 and 256,446.70

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Solution

The fourth proportional to 389,416.30, 584,124.45 and 256,446.70 is: 384,670.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,416.30 : 584,124.45 = 256,446.70 : x
  2. Step 2: Convert to fraction form
    389,416.30/584,124.45 = 256,446.70/x
  3. Step 3: Cross multiply
    389,416.30x = 584,124.45 × 256,446.70
  4. Step 4: Simplify right side
    389,416.30x = 149,796,787,591.82
  5. Step 5: Solve for x
    x = 149,796,787,591.82/389,416.30
  6. Step 6: Final answer
    x = 384,670.05

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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.