Home / 1,020.79-1,531.35-327.63

Finding the Fourth Proportional to 1,020.79, 1,531.35 and 327.63

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Solution

The fourth proportional to 1,020.79, 1,531.35 and 327.63 is: 491.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.79 : 1,531.35 = 327.63 : x
  2. Step 2: Convert to fraction form
    1,020.79/1,531.35 = 327.63/x
  3. Step 3: Cross multiply
    1,020.79x = 1,531.35 × 327.63
  4. Step 4: Simplify right side
    1,020.79x = 501,716.20
  5. Step 5: Solve for x
    x = 501,716.20/1,020.79
  6. Step 6: Final answer
    x = 491.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,021.79, 1,532.85 and 328.63
Similar ratio
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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.