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Finding the Fourth Proportional to 504.76, 696.74 and 318.56

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Solution

The fourth proportional to 504.76, 696.74 and 318.56 is: 439.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.76 : 696.74 = 318.56 : x
  2. Step 2: Convert to fraction form
    504.76/696.74 = 318.56/x
  3. Step 3: Cross multiply
    504.76x = 696.74 × 318.56
  4. Step 4: Simplify right side
    504.76x = 221,953.49
  5. Step 5: Solve for x
    x = 221,953.49/504.76
  6. Step 6: Final answer
    x = 439.72

Related Problems

Find fourth proportional to 252.38, 348.37 and 159.28
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Double scale
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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.