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Finding the Fourth Proportional to 624,145.80, 936,218.70 and 309,217.80

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Solution

The fourth proportional to 624,145.80, 936,218.70 and 309,217.80 is: 463,826.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,145.80 : 936,218.70 = 309,217.80 : x
  2. Step 2: Convert to fraction form
    624,145.80/936,218.70 = 309,217.80/x
  3. Step 3: Cross multiply
    624,145.80x = 936,218.70 × 309,217.80
  4. Step 4: Simplify right side
    624,145.80x = 289,495,486,732.86
  5. Step 5: Solve for x
    x = 289,495,486,732.86/624,145.80
  6. Step 6: Final answer
    x = 463,826.70

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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.