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Finding the Fourth Proportional to 461.94, 691.74 and 307.40

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Solution

The fourth proportional to 461.94, 691.74 and 307.40 is: 460.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.94 : 691.74 = 307.40 : x
  2. Step 2: Convert to fraction form
    461.94/691.74 = 307.40/x
  3. Step 3: Cross multiply
    461.94x = 691.74 × 307.40
  4. Step 4: Simplify right side
    461.94x = 212,637.42
  5. Step 5: Solve for x
    x = 212,637.42/461.94
  6. Step 6: Final answer
    x = 460.31

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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.