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Finding the Fourth Proportional to 1,945.17, 2,918.07 and 714.30

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Solution

The fourth proportional to 1,945.17, 2,918.07 and 714.30 is: 1,071.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.17 : 2,918.07 = 714.30 : x
  2. Step 2: Convert to fraction form
    1,945.17/2,918.07 = 714.30/x
  3. Step 3: Cross multiply
    1,945.17x = 2,918.07 × 714.30
  4. Step 4: Simplify right side
    1,945.17x = 2,084,377.40
  5. Step 5: Solve for x
    x = 2,084,377.40/1,945.17
  6. Step 6: Final answer
    x = 1,071.57

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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.