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Finding the Fourth Proportional to 3,210, 4,430.16 and 1,812.84

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Solution

The fourth proportional to 3,210, 4,430.16 and 1,812.84 is: 2,501.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210 : 4,430.16 = 1,812.84 : x
  2. Step 2: Convert to fraction form
    3,210/4,430.16 = 1,812.84/x
  3. Step 3: Cross multiply
    3,210x = 4,430.16 × 1,812.84
  4. Step 4: Simplify right side
    3,210x = 8,031,171.25
  5. Step 5: Solve for x
    x = 8,031,171.25/3,210
  6. Step 6: Final answer
    x = 2,501.92

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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.