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Finding the Fourth Proportional to 1,013.35, 1,520.39 and 436.63

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Solution

The fourth proportional to 1,013.35, 1,520.39 and 436.63 is: 655.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.35 : 1,520.39 = 436.63 : x
  2. Step 2: Convert to fraction form
    1,013.35/1,520.39 = 436.63/x
  3. Step 3: Cross multiply
    1,013.35x = 1,520.39 × 436.63
  4. Step 4: Simplify right side
    1,013.35x = 663,847.89
  5. Step 5: Solve for x
    x = 663,847.89/1,013.35
  6. Step 6: Final answer
    x = 655.10

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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.