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Finding the Fourth Proportional to 1,114.45, 1,671.90 and 384.10

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Solution

The fourth proportional to 1,114.45, 1,671.90 and 384.10 is: 576.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.45 : 1,671.90 = 384.10 : x
  2. Step 2: Convert to fraction form
    1,114.45/1,671.90 = 384.10/x
  3. Step 3: Cross multiply
    1,114.45x = 1,671.90 × 384.10
  4. Step 4: Simplify right side
    1,114.45x = 642,176.79
  5. Step 5: Solve for x
    x = 642,176.79/1,114.45
  6. Step 6: Final answer
    x = 576.23

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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.