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Finding the Fourth Proportional to 1,385.06, 2,077.56 and 345.06

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Solution

The fourth proportional to 1,385.06, 2,077.56 and 345.06 is: 517.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.06 : 2,077.56 = 345.06 : x
  2. Step 2: Convert to fraction form
    1,385.06/2,077.56 = 345.06/x
  3. Step 3: Cross multiply
    1,385.06x = 2,077.56 × 345.06
  4. Step 4: Simplify right side
    1,385.06x = 716,882.85
  5. Step 5: Solve for x
    x = 716,882.85/1,385.06
  6. Step 6: Final answer
    x = 517.58

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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.