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Finding the Fourth Proportional to 485.32, 670.02 and 457.64

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Solution

The fourth proportional to 485.32, 670.02 and 457.64 is: 631.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.32 : 670.02 = 457.64 : x
  2. Step 2: Convert to fraction form
    485.32/670.02 = 457.64/x
  3. Step 3: Cross multiply
    485.32x = 670.02 × 457.64
  4. Step 4: Simplify right side
    485.32x = 306,627.95
  5. Step 5: Solve for x
    x = 306,627.95/485.32
  6. Step 6: Final answer
    x = 631.81

Related Problems

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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.