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Finding the Fourth Proportional to 862.63, 1,291.65 and 589.25

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Solution

The fourth proportional to 862.63, 1,291.65 and 589.25 is: 882.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.63 : 1,291.65 = 589.25 : x
  2. Step 2: Convert to fraction form
    862.63/1,291.65 = 589.25/x
  3. Step 3: Cross multiply
    862.63x = 1,291.65 × 589.25
  4. Step 4: Simplify right side
    862.63x = 761,105.78
  5. Step 5: Solve for x
    x = 761,105.78/862.63
  6. Step 6: Final answer
    x = 882.31

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Double scale
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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.