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Finding the Fourth Proportional to 1,200.53, 1,800.10 and 469.70

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Solution

The fourth proportional to 1,200.53, 1,800.10 and 469.70 is: 704.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.53 : 1,800.10 = 469.70 : x
  2. Step 2: Convert to fraction form
    1,200.53/1,800.10 = 469.70/x
  3. Step 3: Cross multiply
    1,200.53x = 1,800.10 × 469.70
  4. Step 4: Simplify right side
    1,200.53x = 845,506.97
  5. Step 5: Solve for x
    x = 845,506.97/1,200.53
  6. Step 6: Final answer
    x = 704.28

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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.