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Finding the Fourth Proportional to 454.76, 628.01 and 315.24

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Solution

The fourth proportional to 454.76, 628.01 and 315.24 is: 435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.76 : 628.01 = 315.24 : x
  2. Step 2: Convert to fraction form
    454.76/628.01 = 315.24/x
  3. Step 3: Cross multiply
    454.76x = 628.01 × 315.24
  4. Step 4: Simplify right side
    454.76x = 197,974.66
  5. Step 5: Solve for x
    x = 197,974.66/454.76
  6. Step 6: Final answer
    x = 435.34

Related Problems

Find fourth proportional to 227.38, 314.01 and 157.62
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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.