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Finding the Fourth Proportional to 1,545.08, 2,315.82 and 765.44

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Solution

The fourth proportional to 1,545.08, 2,315.82 and 765.44 is: 1,147.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.08 : 2,315.82 = 765.44 : x
  2. Step 2: Convert to fraction form
    1,545.08/2,315.82 = 765.44/x
  3. Step 3: Cross multiply
    1,545.08x = 2,315.82 × 765.44
  4. Step 4: Simplify right side
    1,545.08x = 1,772,621.26
  5. Step 5: Solve for x
    x = 1,772,621.26/1,545.08
  6. Step 6: Final answer
    x = 1,147.27

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1.5x scale

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.