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Finding the Fourth Proportional to 1,019.86, 1,529.78 and 370.32

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Solution

The fourth proportional to 1,019.86, 1,529.78 and 370.32 is: 555.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.86 : 1,529.78 = 370.32 : x
  2. Step 2: Convert to fraction form
    1,019.86/1,529.78 = 370.32/x
  3. Step 3: Cross multiply
    1,019.86x = 1,529.78 × 370.32
  4. Step 4: Simplify right side
    1,019.86x = 566,508.13
  5. Step 5: Solve for x
    x = 566,508.13/1,019.86
  6. Step 6: Final answer
    x = 555.48

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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.