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Finding the Fourth Proportional to 660.56, 983.76 and 620.56

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Solution

The fourth proportional to 660.56, 983.76 and 620.56 is: 924.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.56 : 983.76 = 620.56 : x
  2. Step 2: Convert to fraction form
    660.56/983.76 = 620.56/x
  3. Step 3: Cross multiply
    660.56x = 983.76 × 620.56
  4. Step 4: Simplify right side
    660.56x = 610,482.11
  5. Step 5: Solve for x
    x = 610,482.11/660.56
  6. Step 6: Final answer
    x = 924.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.