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Finding the Fourth Proportional to 1,312.83, 1,969.25 and 582.21

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Solution

The fourth proportional to 1,312.83, 1,969.25 and 582.21 is: 873.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.83 : 1,969.25 = 582.21 : x
  2. Step 2: Convert to fraction form
    1,312.83/1,969.25 = 582.21/x
  3. Step 3: Cross multiply
    1,312.83x = 1,969.25 × 582.21
  4. Step 4: Simplify right side
    1,312.83x = 1,146,514.13
  5. Step 5: Solve for x
    x = 1,146,514.13/1,312.83
  6. Step 6: Final answer
    x = 873.32

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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.