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Finding the Fourth Proportional to 700.38, 966.72 and 479.28

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Solution

The fourth proportional to 700.38, 966.72 and 479.28 is: 661.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.38 : 966.72 = 479.28 : x
  2. Step 2: Convert to fraction form
    700.38/966.72 = 479.28/x
  3. Step 3: Cross multiply
    700.38x = 966.72 × 479.28
  4. Step 4: Simplify right side
    700.38x = 463,329.56
  5. Step 5: Solve for x
    x = 463,329.56/700.38
  6. Step 6: Final answer
    x = 661.54

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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.