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Finding the Fourth Proportional to 660.70, 986.75 and 530.92

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Solution

The fourth proportional to 660.70, 986.75 and 530.92 is: 792.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.70 : 986.75 = 530.92 : x
  2. Step 2: Convert to fraction form
    660.70/986.75 = 530.92/x
  3. Step 3: Cross multiply
    660.70x = 986.75 × 530.92
  4. Step 4: Simplify right side
    660.70x = 523,885.31
  5. Step 5: Solve for x
    x = 523,885.31/660.70
  6. Step 6: Final answer
    x = 792.92

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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.