Home / 1,035.45-1,428.67-699.98

Finding the Fourth Proportional to 1,035.45, 1,428.67 and 699.98

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Solution

The fourth proportional to 1,035.45, 1,428.67 and 699.98 is: 965.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.45 : 1,428.67 = 699.98 : x
  2. Step 2: Convert to fraction form
    1,035.45/1,428.67 = 699.98/x
  3. Step 3: Cross multiply
    1,035.45x = 1,428.67 × 699.98
  4. Step 4: Simplify right side
    1,035.45x = 1,000,034.16
  5. Step 5: Solve for x
    x = 1,000,034.16/1,035.45
  6. Step 6: Final answer
    x = 965.80

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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.