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Finding the Fourth Proportional to 515.04, 710.75 and 290.96

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Solution

The fourth proportional to 515.04, 710.75 and 290.96 is: 401.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.04 : 710.75 = 290.96 : x
  2. Step 2: Convert to fraction form
    515.04/710.75 = 290.96/x
  3. Step 3: Cross multiply
    515.04x = 710.75 × 290.96
  4. Step 4: Simplify right side
    515.04x = 206,799.82
  5. Step 5: Solve for x
    x = 206,799.82/515.04
  6. Step 6: Final answer
    x = 401.52

Related Problems

Find fourth proportional to 257.52, 355.38 and 145.48
Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.