Home / 1,038.60-1,557.36-518.04

Finding the Fourth Proportional to 1,038.60, 1,557.36 and 518.04

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Solution

The fourth proportional to 1,038.60, 1,557.36 and 518.04 is: 776.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.60 : 1,557.36 = 518.04 : x
  2. Step 2: Convert to fraction form
    1,038.60/1,557.36 = 518.04/x
  3. Step 3: Cross multiply
    1,038.60x = 1,557.36 × 518.04
  4. Step 4: Simplify right side
    1,038.60x = 806,774.77
  5. Step 5: Solve for x
    x = 806,774.77/1,038.60
  6. Step 6: Final answer
    x = 776.79

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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.