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Finding the Fourth Proportional to 700.03, 1,050.45 and 644.95

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Solution

The fourth proportional to 700.03, 1,050.45 and 644.95 is: 967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.03 : 1,050.45 = 644.95 : x
  2. Step 2: Convert to fraction form
    700.03/1,050.45 = 644.95/x
  3. Step 3: Cross multiply
    700.03x = 1,050.45 × 644.95
  4. Step 4: Simplify right side
    700.03x = 677,487.73
  5. Step 5: Solve for x
    x = 677,487.73/700.03
  6. Step 6: Final answer
    x = 967.80

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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.