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Finding the Fourth Proportional to 903.17, 1,246.95 and 808.47

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Solution

The fourth proportional to 903.17, 1,246.95 and 808.47 is: 1,116.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.17 : 1,246.95 = 808.47 : x
  2. Step 2: Convert to fraction form
    903.17/1,246.95 = 808.47/x
  3. Step 3: Cross multiply
    903.17x = 1,246.95 × 808.47
  4. Step 4: Simplify right side
    903.17x = 1,008,127.45
  5. Step 5: Solve for x
    x = 1,008,127.45/903.17
  6. Step 6: Final answer
    x = 1,116.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.