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Finding the Fourth Proportional to 900.60, 1,351.10 and 380.93

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Solution

The fourth proportional to 900.60, 1,351.10 and 380.93 is: 571.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.60 : 1,351.10 = 380.93 : x
  2. Step 2: Convert to fraction form
    900.60/1,351.10 = 380.93/x
  3. Step 3: Cross multiply
    900.60x = 1,351.10 × 380.93
  4. Step 4: Simplify right side
    900.60x = 514,665.86
  5. Step 5: Solve for x
    x = 514,665.86/900.60
  6. Step 6: Final answer
    x = 571.47

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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.