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Finding the Fourth Proportional to 457.70, 631.55 and 261.18

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Solution

The fourth proportional to 457.70, 631.55 and 261.18 is: 360.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.70 : 631.55 = 261.18 : x
  2. Step 2: Convert to fraction form
    457.70/631.55 = 261.18/x
  3. Step 3: Cross multiply
    457.70x = 631.55 × 261.18
  4. Step 4: Simplify right side
    457.70x = 164,946.92
  5. Step 5: Solve for x
    x = 164,946.92/457.70
  6. Step 6: Final answer
    x = 360.39

Related Problems

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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.