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Finding the Fourth Proportional to 388,403.40, 582,605.10 and 230,809.80

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Solution

The fourth proportional to 388,403.40, 582,605.10 and 230,809.80 is: 346,214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,403.40 : 582,605.10 = 230,809.80 : x
  2. Step 2: Convert to fraction form
    388,403.40/582,605.10 = 230,809.80/x
  3. Step 3: Cross multiply
    388,403.40x = 582,605.10 × 230,809.80
  4. Step 4: Simplify right side
    388,403.40x = 134,470,966,609.98
  5. Step 5: Solve for x
    x = 134,470,966,609.98/388,403.40
  6. Step 6: Final answer
    x = 346,214.70

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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.