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Finding the Fourth Proportional to 699.58, 1,050.05 and 515.05

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Solution

The fourth proportional to 699.58, 1,050.05 and 515.05 is: 773.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.58 : 1,050.05 = 515.05 : x
  2. Step 2: Convert to fraction form
    699.58/1,050.05 = 515.05/x
  3. Step 3: Cross multiply
    699.58x = 1,050.05 × 515.05
  4. Step 4: Simplify right side
    699.58x = 540,828.25
  5. Step 5: Solve for x
    x = 540,828.25/699.58
  6. Step 6: Final answer
    x = 773.08

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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.