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Finding the Fourth Proportional to 1,653.57, 2,478.63 and 557.56

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Solution

The fourth proportional to 1,653.57, 2,478.63 and 557.56 is: 835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.57 : 2,478.63 = 557.56 : x
  2. Step 2: Convert to fraction form
    1,653.57/2,478.63 = 557.56/x
  3. Step 3: Cross multiply
    1,653.57x = 2,478.63 × 557.56
  4. Step 4: Simplify right side
    1,653.57x = 1,381,978.75
  5. Step 5: Solve for x
    x = 1,381,978.75/1,653.57
  6. Step 6: Final answer
    x = 835.75

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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.