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Finding the Fourth Proportional to 699.70, 965.58 and 384.99

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Solution

The fourth proportional to 699.70, 965.58 and 384.99 is: 531.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.70 : 965.58 = 384.99 : x
  2. Step 2: Convert to fraction form
    699.70/965.58 = 384.99/x
  3. Step 3: Cross multiply
    699.70x = 965.58 × 384.99
  4. Step 4: Simplify right side
    699.70x = 371,733.82
  5. Step 5: Solve for x
    x = 371,733.82/699.70
  6. Step 6: Final answer
    x = 531.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.