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Finding the Fourth Proportional to 448.64, 673.98 and 430.18

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Solution

The fourth proportional to 448.64, 673.98 and 430.18 is: 646.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.64 : 673.98 = 430.18 : x
  2. Step 2: Convert to fraction form
    448.64/673.98 = 430.18/x
  3. Step 3: Cross multiply
    448.64x = 673.98 × 430.18
  4. Step 4: Simplify right side
    448.64x = 289,932.72
  5. Step 5: Solve for x
    x = 289,932.72/448.64
  6. Step 6: Final answer
    x = 646.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.