Home / 1,812.02-2,715.93-770.45

Finding the Fourth Proportional to 1,812.02, 2,715.93 and 770.45

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Solution

The fourth proportional to 1,812.02, 2,715.93 and 770.45 is: 1,154.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.02 : 2,715.93 = 770.45 : x
  2. Step 2: Convert to fraction form
    1,812.02/2,715.93 = 770.45/x
  3. Step 3: Cross multiply
    1,812.02x = 2,715.93 × 770.45
  4. Step 4: Simplify right side
    1,812.02x = 2,092,488.27
  5. Step 5: Solve for x
    x = 2,092,488.27/1,812.02
  6. Step 6: Final answer
    x = 1,154.78

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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.