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Finding the Fourth Proportional to 700.41, 1,050.06 and 640.20

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Solution

The fourth proportional to 700.41, 1,050.06 and 640.20 is: 959.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.41 : 1,050.06 = 640.20 : x
  2. Step 2: Convert to fraction form
    700.41/1,050.06 = 640.20/x
  3. Step 3: Cross multiply
    700.41x = 1,050.06 × 640.20
  4. Step 4: Simplify right side
    700.41x = 672,248.41
  5. Step 5: Solve for x
    x = 672,248.41/700.41
  6. Step 6: Final answer
    x = 959.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.