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Finding the Fourth Proportional to 867.31, 1,300.53 and 497.05

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Solution

The fourth proportional to 867.31, 1,300.53 and 497.05 is: 745.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.31 : 1,300.53 = 497.05 : x
  2. Step 2: Convert to fraction form
    867.31/1,300.53 = 497.05/x
  3. Step 3: Cross multiply
    867.31x = 1,300.53 × 497.05
  4. Step 4: Simplify right side
    867.31x = 646,428.44
  5. Step 5: Solve for x
    x = 646,428.44/867.31
  6. Step 6: Final answer
    x = 745.33

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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.