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Finding the Fourth Proportional to 705.59, 1,057.50 and 500.21

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Solution

The fourth proportional to 705.59, 1,057.50 and 500.21 is: 749.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.59 : 1,057.50 = 500.21 : x
  2. Step 2: Convert to fraction form
    705.59/1,057.50 = 500.21/x
  3. Step 3: Cross multiply
    705.59x = 1,057.50 × 500.21
  4. Step 4: Simplify right side
    705.59x = 528,974.72
  5. Step 5: Solve for x
    x = 528,974.72/705.59
  6. Step 6: Final answer
    x = 749.69

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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.