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Finding the Fourth Proportional to 624.21, 860.77 and 437.64

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Solution

The fourth proportional to 624.21, 860.77 and 437.64 is: 603.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.21 : 860.77 = 437.64 : x
  2. Step 2: Convert to fraction form
    624.21/860.77 = 437.64/x
  3. Step 3: Cross multiply
    624.21x = 860.77 × 437.64
  4. Step 4: Simplify right side
    624.21x = 376,707.38
  5. Step 5: Solve for x
    x = 376,707.38/624.21
  6. Step 6: Final answer
    x = 603.49

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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.