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Finding the Fourth Proportional to 924.15, 1,386.36 and 307.94

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Solution

The fourth proportional to 924.15, 1,386.36 and 307.94 is: 461.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.15 : 1,386.36 = 307.94 : x
  2. Step 2: Convert to fraction form
    924.15/1,386.36 = 307.94/x
  3. Step 3: Cross multiply
    924.15x = 1,386.36 × 307.94
  4. Step 4: Simplify right side
    924.15x = 426,919.16
  5. Step 5: Solve for x
    x = 426,919.16/924.15
  6. Step 6: Final answer
    x = 461.96

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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.