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Finding the Fourth Proportional to 669.48, 999.69 and 530.97

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Solution

The fourth proportional to 669.48, 999.69 and 530.97 is: 792.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.48 : 999.69 = 530.97 : x
  2. Step 2: Convert to fraction form
    669.48/999.69 = 530.97/x
  3. Step 3: Cross multiply
    669.48x = 999.69 × 530.97
  4. Step 4: Simplify right side
    669.48x = 530,805.40
  5. Step 5: Solve for x
    x = 530,805.40/669.48
  6. Step 6: Final answer
    x = 792.86

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Double scale
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1.5x scale

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.