Home / 1,579.36-2,368.80-425.20

Finding the Fourth Proportional to 1,579.36, 2,368.80 and 425.20

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Solution

The fourth proportional to 1,579.36, 2,368.80 and 425.20 is: 637.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.36 : 2,368.80 = 425.20 : x
  2. Step 2: Convert to fraction form
    1,579.36/2,368.80 = 425.20/x
  3. Step 3: Cross multiply
    1,579.36x = 2,368.80 × 425.20
  4. Step 4: Simplify right side
    1,579.36x = 1,007,213.76
  5. Step 5: Solve for x
    x = 1,007,213.76/1,579.36
  6. Step 6: Final answer
    x = 637.74

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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.