Home / 1,345.22-2,018.06-420.56

Finding the Fourth Proportional to 1,345.22, 2,018.06 and 420.56

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Solution

The fourth proportional to 1,345.22, 2,018.06 and 420.56 is: 630.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.22 : 2,018.06 = 420.56 : x
  2. Step 2: Convert to fraction form
    1,345.22/2,018.06 = 420.56/x
  3. Step 3: Cross multiply
    1,345.22x = 2,018.06 × 420.56
  4. Step 4: Simplify right side
    1,345.22x = 848,715.31
  5. Step 5: Solve for x
    x = 848,715.31/1,345.22
  6. Step 6: Final answer
    x = 630.91

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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.