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Finding the Fourth Proportional to 2,210, 3,315.78 and 977.25

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Solution

The fourth proportional to 2,210, 3,315.78 and 977.25 is: 1,466.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,210 : 3,315.78 = 977.25 : x
  2. Step 2: Convert to fraction form
    2,210/3,315.78 = 977.25/x
  3. Step 3: Cross multiply
    2,210x = 3,315.78 × 977.25
  4. Step 4: Simplify right side
    2,210x = 3,240,346.01
  5. Step 5: Solve for x
    x = 3,240,346.01/2,210
  6. Step 6: Final answer
    x = 1,466.22

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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.