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Finding the Fourth Proportional to 1,753.20, 2,624.40 and 1,440

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Solution

The fourth proportional to 1,753.20, 2,624.40 and 1,440 is: 2,155.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,753.20 : 2,624.40 = 1,440 : x
  2. Step 2: Convert to fraction form
    1,753.20/2,624.40 = 1,440/x
  3. Step 3: Cross multiply
    1,753.20x = 2,624.40 × 1,440
  4. Step 4: Simplify right side
    1,753.20x = 3,779,136
  5. Step 5: Solve for x
    x = 3,779,136/1,753.20
  6. Step 6: Final answer
    x = 2,155.56

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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.