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Finding the Fourth Proportional to 1,607.40, 2,411.44 and 511.74

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Solution

The fourth proportional to 1,607.40, 2,411.44 and 511.74 is: 767.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.40 : 2,411.44 = 511.74 : x
  2. Step 2: Convert to fraction form
    1,607.40/2,411.44 = 511.74/x
  3. Step 3: Cross multiply
    1,607.40x = 2,411.44 × 511.74
  4. Step 4: Simplify right side
    1,607.40x = 1,234,030.31
  5. Step 5: Solve for x
    x = 1,234,030.31/1,607.40
  6. Step 6: Final answer
    x = 767.72

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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.