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Finding the Fourth Proportional to 653.61, 979.76 and 307.14

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Solution

The fourth proportional to 653.61, 979.76 and 307.14 is: 460.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.61 : 979.76 = 307.14 : x
  2. Step 2: Convert to fraction form
    653.61/979.76 = 307.14/x
  3. Step 3: Cross multiply
    653.61x = 979.76 × 307.14
  4. Step 4: Simplify right side
    653.61x = 300,920.58
  5. Step 5: Solve for x
    x = 300,920.58/653.61
  6. Step 6: Final answer
    x = 460.40

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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.