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Finding the Fourth Proportional to 670.36, 925.08 and 474.20

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Solution

The fourth proportional to 670.36, 925.08 and 474.20 is: 654.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.36 : 925.08 = 474.20 : x
  2. Step 2: Convert to fraction form
    670.36/925.08 = 474.20/x
  3. Step 3: Cross multiply
    670.36x = 925.08 × 474.20
  4. Step 4: Simplify right side
    670.36x = 438,672.94
  5. Step 5: Solve for x
    x = 438,672.94/670.36
  6. Step 6: Final answer
    x = 654.38

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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.