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Finding the Fourth Proportional to 2,423.65, 3,636.04 and 780.21

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Solution

The fourth proportional to 2,423.65, 3,636.04 and 780.21 is: 1,170.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,423.65 : 3,636.04 = 780.21 : x
  2. Step 2: Convert to fraction form
    2,423.65/3,636.04 = 780.21/x
  3. Step 3: Cross multiply
    2,423.65x = 3,636.04 × 780.21
  4. Step 4: Simplify right side
    2,423.65x = 2,836,874.77
  5. Step 5: Solve for x
    x = 2,836,874.77/2,423.65
  6. Step 6: Final answer
    x = 1,170.50

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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.