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Finding the Fourth Proportional to 699.40, 965.14 and 404.76

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Solution

The fourth proportional to 699.40, 965.14 and 404.76 is: 558.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.40 : 965.14 = 404.76 : x
  2. Step 2: Convert to fraction form
    699.40/965.14 = 404.76/x
  3. Step 3: Cross multiply
    699.40x = 965.14 × 404.76
  4. Step 4: Simplify right side
    699.40x = 390,653.81
  5. Step 5: Solve for x
    x = 390,653.81/699.40
  6. Step 6: Final answer
    x = 558.55

Related Problems

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Half scale
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Double scale
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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.