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Finding the Fourth Proportional to 2,140.48, 3,210.18 and 753.45

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Solution

The fourth proportional to 2,140.48, 3,210.18 and 753.45 is: 1,129.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.48 : 3,210.18 = 753.45 : x
  2. Step 2: Convert to fraction form
    2,140.48/3,210.18 = 753.45/x
  3. Step 3: Cross multiply
    2,140.48x = 3,210.18 × 753.45
  4. Step 4: Simplify right side
    2,140.48x = 2,418,717.55
  5. Step 5: Solve for x
    x = 2,418,717.55/2,140.48
  6. Step 6: Final answer
    x = 1,129.99

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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.