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Finding the Fourth Proportional to 972.62, 1,460.99 and 928.56

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Solution

The fourth proportional to 972.62, 1,460.99 and 928.56 is: 1,394.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.62 : 1,460.99 = 928.56 : x
  2. Step 2: Convert to fraction form
    972.62/1,460.99 = 928.56/x
  3. Step 3: Cross multiply
    972.62x = 1,460.99 × 928.56
  4. Step 4: Simplify right side
    972.62x = 1,356,616.87
  5. Step 5: Solve for x
    x = 1,356,616.87/972.62
  6. Step 6: Final answer
    x = 1,394.81

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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.