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Finding the Fourth Proportional to 1,020.09, 1,530.15 and 370.83

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Solution

The fourth proportional to 1,020.09, 1,530.15 and 370.83 is: 556.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.09 : 1,530.15 = 370.83 : x
  2. Step 2: Convert to fraction form
    1,020.09/1,530.15 = 370.83/x
  3. Step 3: Cross multiply
    1,020.09x = 1,530.15 × 370.83
  4. Step 4: Simplify right side
    1,020.09x = 567,425.52
  5. Step 5: Solve for x
    x = 567,425.52/1,020.09
  6. Step 6: Final answer
    x = 556.25

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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.