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Finding the Fourth Proportional to 675.09, 931.59 and 380.45

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Solution

The fourth proportional to 675.09, 931.59 and 380.45 is: 525.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.09 : 931.59 = 380.45 : x
  2. Step 2: Convert to fraction form
    675.09/931.59 = 380.45/x
  3. Step 3: Cross multiply
    675.09x = 931.59 × 380.45
  4. Step 4: Simplify right side
    675.09x = 354,423.42
  5. Step 5: Solve for x
    x = 354,423.42/675.09
  6. Step 6: Final answer
    x = 525.00

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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.