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Finding the Fourth Proportional to 448.79, 669.94 and 357.35

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Solution

The fourth proportional to 448.79, 669.94 and 357.35 is: 533.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.79 : 669.94 = 357.35 : x
  2. Step 2: Convert to fraction form
    448.79/669.94 = 357.35/x
  3. Step 3: Cross multiply
    448.79x = 669.94 × 357.35
  4. Step 4: Simplify right side
    448.79x = 239,403.06
  5. Step 5: Solve for x
    x = 239,403.06/448.79
  6. Step 6: Final answer
    x = 533.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.