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Finding the Fourth Proportional to 949.01, 1,307.21 and 668.77

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Solution

The fourth proportional to 949.01, 1,307.21 and 668.77 is: 921.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.01 : 1,307.21 = 668.77 : x
  2. Step 2: Convert to fraction form
    949.01/1,307.21 = 668.77/x
  3. Step 3: Cross multiply
    949.01x = 1,307.21 × 668.77
  4. Step 4: Simplify right side
    949.01x = 874,216.22
  5. Step 5: Solve for x
    x = 874,216.22/949.01
  6. Step 6: Final answer
    x = 921.19

Related Problems

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Half scale
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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.