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Finding the Fourth Proportional to 1,493.03, 2,240.70 and 753.40

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Solution

The fourth proportional to 1,493.03, 2,240.70 and 753.40 is: 1,130.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,493.03 : 2,240.70 = 753.40 : x
  2. Step 2: Convert to fraction form
    1,493.03/2,240.70 = 753.40/x
  3. Step 3: Cross multiply
    1,493.03x = 2,240.70 × 753.40
  4. Step 4: Simplify right side
    1,493.03x = 1,688,143.38
  5. Step 5: Solve for x
    x = 1,688,143.38/1,493.03
  6. Step 6: Final answer
    x = 1,130.68

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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.