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Finding the Fourth Proportional to 671.83, 926.98 and 485.74

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Solution

The fourth proportional to 671.83, 926.98 and 485.74 is: 670.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.83 : 926.98 = 485.74 : x
  2. Step 2: Convert to fraction form
    671.83/926.98 = 485.74/x
  3. Step 3: Cross multiply
    671.83x = 926.98 × 485.74
  4. Step 4: Simplify right side
    671.83x = 450,271.27
  5. Step 5: Solve for x
    x = 450,271.27/671.83
  6. Step 6: Final answer
    x = 670.22

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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.