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Finding the Fourth Proportional to 1,661.34, 2,491.92 and 507

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Solution

The fourth proportional to 1,661.34, 2,491.92 and 507 is: 760.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.34 : 2,491.92 = 507 : x
  2. Step 2: Convert to fraction form
    1,661.34/2,491.92 = 507/x
  3. Step 3: Cross multiply
    1,661.34x = 2,491.92 × 507
  4. Step 4: Simplify right side
    1,661.34x = 1,263,403.44
  5. Step 5: Solve for x
    x = 1,263,403.44/1,661.34
  6. Step 6: Final answer
    x = 760.47

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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.