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Finding the Fourth Proportional to 653.33, 902.75 and 485.03

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Solution

The fourth proportional to 653.33, 902.75 and 485.03 is: 670.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.33 : 902.75 = 485.03 : x
  2. Step 2: Convert to fraction form
    653.33/902.75 = 485.03/x
  3. Step 3: Cross multiply
    653.33x = 902.75 × 485.03
  4. Step 4: Simplify right side
    653.33x = 437,860.66
  5. Step 5: Solve for x
    x = 437,860.66/653.33
  6. Step 6: Final answer
    x = 670.20

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.