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Finding the Fourth Proportional to 691.99, 954.53 and 443.22

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Solution

The fourth proportional to 691.99, 954.53 and 443.22 is: 611.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.99 : 954.53 = 443.22 : x
  2. Step 2: Convert to fraction form
    691.99/954.53 = 443.22/x
  3. Step 3: Cross multiply
    691.99x = 954.53 × 443.22
  4. Step 4: Simplify right side
    691.99x = 423,064.57
  5. Step 5: Solve for x
    x = 423,064.57/691.99
  6. Step 6: Final answer
    x = 611.38

Related Problems

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Half scale
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Double scale
Find fourth proportional to 692.99, 955.90 and 444.22
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.