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Finding the Fourth Proportional to 1,017.13, 1,402.28 and 808.00

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Solution

The fourth proportional to 1,017.13, 1,402.28 and 808.00 is: 1,113.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.13 : 1,402.28 = 808.00 : x
  2. Step 2: Convert to fraction form
    1,017.13/1,402.28 = 808.00/x
  3. Step 3: Cross multiply
    1,017.13x = 1,402.28 × 808.00
  4. Step 4: Simplify right side
    1,017.13x = 1,133,031.19
  5. Step 5: Solve for x
    x = 1,133,031.19/1,017.13
  6. Step 6: Final answer
    x = 1,113.95

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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.