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Finding the Fourth Proportional to 1,415.53, 1,953.60 and 826.06

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Solution

The fourth proportional to 1,415.53, 1,953.60 and 826.06 is: 1,140.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.53 : 1,953.60 = 826.06 : x
  2. Step 2: Convert to fraction form
    1,415.53/1,953.60 = 826.06/x
  3. Step 3: Cross multiply
    1,415.53x = 1,953.60 × 826.06
  4. Step 4: Simplify right side
    1,415.53x = 1,613,790.82
  5. Step 5: Solve for x
    x = 1,613,790.82/1,415.53
  6. Step 6: Final answer
    x = 1,140.07

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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.