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Finding the Fourth Proportional to 623.08, 934.40 and 521.02

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Solution

The fourth proportional to 623.08, 934.40 and 521.02 is: 781.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.08 : 934.40 = 521.02 : x
  2. Step 2: Convert to fraction form
    623.08/934.40 = 521.02/x
  3. Step 3: Cross multiply
    623.08x = 934.40 × 521.02
  4. Step 4: Simplify right side
    623.08x = 486,836.42
  5. Step 5: Solve for x
    x = 486,836.42/623.08
  6. Step 6: Final answer
    x = 781.34

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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.