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Finding the Fourth Proportional to 670.78, 926.10 and 484.87

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Solution

The fourth proportional to 670.78, 926.10 and 484.87 is: 669.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.78 : 926.10 = 484.87 : x
  2. Step 2: Convert to fraction form
    670.78/926.10 = 484.87/x
  3. Step 3: Cross multiply
    670.78x = 926.10 × 484.87
  4. Step 4: Simplify right side
    670.78x = 449,038.11
  5. Step 5: Solve for x
    x = 449,038.11/670.78
  6. Step 6: Final answer
    x = 669.43

Related Problems

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Half scale
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Double scale
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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.