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Finding the Fourth Proportional to 1,545.78, 2,317.48 and 505.15

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Solution

The fourth proportional to 1,545.78, 2,317.48 and 505.15 is: 757.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.78 : 2,317.48 = 505.15 : x
  2. Step 2: Convert to fraction form
    1,545.78/2,317.48 = 505.15/x
  3. Step 3: Cross multiply
    1,545.78x = 2,317.48 × 505.15
  4. Step 4: Simplify right side
    1,545.78x = 1,170,675.02
  5. Step 5: Solve for x
    x = 1,170,675.02/1,545.78
  6. Step 6: Final answer
    x = 757.34

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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.