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Finding the Fourth Proportional to 1,013.48, 1,520.09 and 436.28

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Solution

The fourth proportional to 1,013.48, 1,520.09 and 436.28 is: 654.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.48 : 1,520.09 = 436.28 : x
  2. Step 2: Convert to fraction form
    1,013.48/1,520.09 = 436.28/x
  3. Step 3: Cross multiply
    1,013.48x = 1,520.09 × 436.28
  4. Step 4: Simplify right side
    1,013.48x = 663,184.87
  5. Step 5: Solve for x
    x = 663,184.87/1,013.48
  6. Step 6: Final answer
    x = 654.36

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Double scale
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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.