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Finding the Fourth Proportional to 647.70, 893.56 and 451.32

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Solution

The fourth proportional to 647.70, 893.56 and 451.32 is: 622.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.70 : 893.56 = 451.32 : x
  2. Step 2: Convert to fraction form
    647.70/893.56 = 451.32/x
  3. Step 3: Cross multiply
    647.70x = 893.56 × 451.32
  4. Step 4: Simplify right side
    647.70x = 403,281.62
  5. Step 5: Solve for x
    x = 403,281.62/647.70
  6. Step 6: Final answer
    x = 622.64

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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.