Home / 1,285.61-1,928.21-554.99

Finding the Fourth Proportional to 1,285.61, 1,928.21 and 554.99

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Solution

The fourth proportional to 1,285.61, 1,928.21 and 554.99 is: 832.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.61 : 1,928.21 = 554.99 : x
  2. Step 2: Convert to fraction form
    1,285.61/1,928.21 = 554.99/x
  3. Step 3: Cross multiply
    1,285.61x = 1,928.21 × 554.99
  4. Step 4: Simplify right side
    1,285.61x = 1,070,124.85
  5. Step 5: Solve for x
    x = 1,070,124.85/1,285.61
  6. Step 6: Final answer
    x = 832.39

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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.