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Finding the Fourth Proportional to 671.55, 925.35 and 435.21

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Solution

The fourth proportional to 671.55, 925.35 and 435.21 is: 599.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.55 : 925.35 = 435.21 : x
  2. Step 2: Convert to fraction form
    671.55/925.35 = 435.21/x
  3. Step 3: Cross multiply
    671.55x = 925.35 × 435.21
  4. Step 4: Simplify right side
    671.55x = 402,721.57
  5. Step 5: Solve for x
    x = 402,721.57/671.55
  6. Step 6: Final answer
    x = 599.69

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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.