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Finding the Fourth Proportional to 673.16, 928.20 and 486.32

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Solution

The fourth proportional to 673.16, 928.20 and 486.32 is: 670.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.16 : 928.20 = 486.32 : x
  2. Step 2: Convert to fraction form
    673.16/928.20 = 486.32/x
  3. Step 3: Cross multiply
    673.16x = 928.20 × 486.32
  4. Step 4: Simplify right side
    673.16x = 451,402.22
  5. Step 5: Solve for x
    x = 451,402.22/673.16
  6. Step 6: Final answer
    x = 670.57

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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.