Home / 809,364.60-1,214,046.90-388,423.80

Finding the Fourth Proportional to 809,364.60, 1,214,046.90 and 388,423.80

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Solution

The fourth proportional to 809,364.60, 1,214,046.90 and 388,423.80 is: 582,635.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,364.60 : 1,214,046.90 = 388,423.80 : x
  2. Step 2: Convert to fraction form
    809,364.60/1,214,046.90 = 388,423.80/x
  3. Step 3: Cross multiply
    809,364.60x = 1,214,046.90 × 388,423.80
  4. Step 4: Simplify right side
    809,364.60x = 471,564,710,276.22
  5. Step 5: Solve for x
    x = 471,564,710,276.22/809,364.60
  6. Step 6: Final answer
    x = 582,635.70

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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.