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Finding the Fourth Proportional to 1,345.55, 2,018.32 and 371.72

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Solution

The fourth proportional to 1,345.55, 2,018.32 and 371.72 is: 557.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.55 : 2,018.32 = 371.72 : x
  2. Step 2: Convert to fraction form
    1,345.55/2,018.32 = 371.72/x
  3. Step 3: Cross multiply
    1,345.55x = 2,018.32 × 371.72
  4. Step 4: Simplify right side
    1,345.55x = 750,254.03
  5. Step 5: Solve for x
    x = 750,254.03/1,345.55
  6. Step 6: Final answer
    x = 557.58

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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.