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Finding the Fourth Proportional to 699.48, 965.48 and 451.12

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Solution

The fourth proportional to 699.48, 965.48 and 451.12 is: 622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.48 : 965.48 = 451.12 : x
  2. Step 2: Convert to fraction form
    699.48/965.48 = 451.12/x
  3. Step 3: Cross multiply
    699.48x = 965.48 × 451.12
  4. Step 4: Simplify right side
    699.48x = 435,547.34
  5. Step 5: Solve for x
    x = 435,547.34/699.48
  6. Step 6: Final answer
    x = 622.67

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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.