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Finding the Fourth Proportional to 1,345.31, 2,018.00 and 479.63

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Solution

The fourth proportional to 1,345.31, 2,018.00 and 479.63 is: 719.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.31 : 2,018.00 = 479.63 : x
  2. Step 2: Convert to fraction form
    1,345.31/2,018.00 = 479.63/x
  3. Step 3: Cross multiply
    1,345.31x = 2,018.00 × 479.63
  4. Step 4: Simplify right side
    1,345.31x = 967,884.45
  5. Step 5: Solve for x
    x = 967,884.45/1,345.31
  6. Step 6: Final answer
    x = 719.45

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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.