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Finding the Fourth Proportional to 637.25, 879.45 and 357.51

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Solution

The fourth proportional to 637.25, 879.45 and 357.51 is: 493.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.25 : 879.45 = 357.51 : x
  2. Step 2: Convert to fraction form
    637.25/879.45 = 357.51/x
  3. Step 3: Cross multiply
    637.25x = 879.45 × 357.51
  4. Step 4: Simplify right side
    637.25x = 314,416.81
  5. Step 5: Solve for x
    x = 314,416.81/637.25
  6. Step 6: Final answer
    x = 493.39

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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.