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Finding the Fourth Proportional to 903.81, 1,356.81 and 538.77

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Solution

The fourth proportional to 903.81, 1,356.81 and 538.77 is: 808.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.81 : 1,356.81 = 538.77 : x
  2. Step 2: Convert to fraction form
    903.81/1,356.81 = 538.77/x
  3. Step 3: Cross multiply
    903.81x = 1,356.81 × 538.77
  4. Step 4: Simplify right side
    903.81x = 731,008.52
  5. Step 5: Solve for x
    x = 731,008.52/903.81
  6. Step 6: Final answer
    x = 808.81

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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.