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Finding the Fourth Proportional to 1,345.39, 2,018.09 and 371.50

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Solution

The fourth proportional to 1,345.39, 2,018.09 and 371.50 is: 557.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.39 : 2,018.09 = 371.50 : x
  2. Step 2: Convert to fraction form
    1,345.39/2,018.09 = 371.50/x
  3. Step 3: Cross multiply
    1,345.39x = 2,018.09 × 371.50
  4. Step 4: Simplify right side
    1,345.39x = 749,708.49
  5. Step 5: Solve for x
    x = 749,708.49/1,345.39
  6. Step 6: Final answer
    x = 557.24

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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.