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Finding the Fourth Proportional to 1,479.79, 2,219.78 and 555.29

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Solution

The fourth proportional to 1,479.79, 2,219.78 and 555.29 is: 832.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.79 : 2,219.78 = 555.29 : x
  2. Step 2: Convert to fraction form
    1,479.79/2,219.78 = 555.29/x
  3. Step 3: Cross multiply
    1,479.79x = 2,219.78 × 555.29
  4. Step 4: Simplify right side
    1,479.79x = 1,232,621.64
  5. Step 5: Solve for x
    x = 1,232,621.64/1,479.79
  6. Step 6: Final answer
    x = 832.97

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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.