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Finding the Fourth Proportional to 504.76, 696.26 and 308.20

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Solution

The fourth proportional to 504.76, 696.26 and 308.20 is: 425.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.76 : 696.26 = 308.20 : x
  2. Step 2: Convert to fraction form
    504.76/696.26 = 308.20/x
  3. Step 3: Cross multiply
    504.76x = 696.26 × 308.20
  4. Step 4: Simplify right side
    504.76x = 214,587.33
  5. Step 5: Solve for x
    x = 214,587.33/504.76
  6. Step 6: Final answer
    x = 425.13

Related Problems

Find fourth proportional to 252.38, 348.13 and 154.10
Half scale
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Double scale
Find fourth proportional to 505.76, 697.64 and 309.20
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.