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Finding the Fourth Proportional to 867.81, 1,300.75 and 347.68

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Solution

The fourth proportional to 867.81, 1,300.75 and 347.68 is: 521.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.81 : 1,300.75 = 347.68 : x
  2. Step 2: Convert to fraction form
    867.81/1,300.75 = 347.68/x
  3. Step 3: Cross multiply
    867.81x = 1,300.75 × 347.68
  4. Step 4: Simplify right side
    867.81x = 452,244.76
  5. Step 5: Solve for x
    x = 452,244.76/867.81
  6. Step 6: Final answer
    x = 521.13

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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.