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Finding the Fourth Proportional to 518.76, 716.16 and 492.12

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Solution

The fourth proportional to 518.76, 716.16 and 492.12 is: 679.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.76 : 716.16 = 492.12 : x
  2. Step 2: Convert to fraction form
    518.76/716.16 = 492.12/x
  3. Step 3: Cross multiply
    518.76x = 716.16 × 492.12
  4. Step 4: Simplify right side
    518.76x = 352,436.66
  5. Step 5: Solve for x
    x = 352,436.66/518.76
  6. Step 6: Final answer
    x = 679.38

Related Problems

Find fourth proportional to 259.38, 358.08 and 246.06
Half scale
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Double scale
Find fourth proportional to 519.76, 717.54 and 493.12
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.