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Finding the Fourth Proportional to 1,013.59, 1,520.75 and 355.57

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Solution

The fourth proportional to 1,013.59, 1,520.75 and 355.57 is: 533.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.59 : 1,520.75 = 355.57 : x
  2. Step 2: Convert to fraction form
    1,013.59/1,520.75 = 355.57/x
  3. Step 3: Cross multiply
    1,013.59x = 1,520.75 × 355.57
  4. Step 4: Simplify right side
    1,013.59x = 540,733.08
  5. Step 5: Solve for x
    x = 540,733.08/1,013.59
  6. Step 6: Final answer
    x = 533.48

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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.