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Finding the Fourth Proportional to 679.06, 936.53 and 457.72

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Solution

The fourth proportional to 679.06, 936.53 and 457.72 is: 631.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.06 : 936.53 = 457.72 : x
  2. Step 2: Convert to fraction form
    679.06/936.53 = 457.72/x
  3. Step 3: Cross multiply
    679.06x = 936.53 × 457.72
  4. Step 4: Simplify right side
    679.06x = 428,666.22
  5. Step 5: Solve for x
    x = 428,666.22/679.06
  6. Step 6: Final answer
    x = 631.26

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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.