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Finding the Fourth Proportional to 631.83, 946.70 and 220.74

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Solution

The fourth proportional to 631.83, 946.70 and 220.74 is: 330.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.83 : 946.70 = 220.74 : x
  2. Step 2: Convert to fraction form
    631.83/946.70 = 220.74/x
  3. Step 3: Cross multiply
    631.83x = 946.70 × 220.74
  4. Step 4: Simplify right side
    631.83x = 208,973.45
  5. Step 5: Solve for x
    x = 208,973.45/631.83
  6. Step 6: Final answer
    x = 330.74

Related Problems

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Half scale
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Double scale
Find fourth proportional to 632.83, 948.19 and 221.74
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.