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Finding the Fourth Proportional to 1,417.52, 2,120.73 and 953.07

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Solution

The fourth proportional to 1,417.52, 2,120.73 and 953.07 is: 1,425.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.52 : 2,120.73 = 953.07 : x
  2. Step 2: Convert to fraction form
    1,417.52/2,120.73 = 953.07/x
  3. Step 3: Cross multiply
    1,417.52x = 2,120.73 × 953.07
  4. Step 4: Simplify right side
    1,417.52x = 2,021,204.14
  5. Step 5: Solve for x
    x = 2,021,204.14/1,417.52
  6. Step 6: Final answer
    x = 1,425.88

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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.