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Finding the Fourth Proportional to 1,235.74, 1,852.80 and 505.12

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Solution

The fourth proportional to 1,235.74, 1,852.80 and 505.12 is: 757.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.74 : 1,852.80 = 505.12 : x
  2. Step 2: Convert to fraction form
    1,235.74/1,852.80 = 505.12/x
  3. Step 3: Cross multiply
    1,235.74x = 1,852.80 × 505.12
  4. Step 4: Simplify right side
    1,235.74x = 935,886.34
  5. Step 5: Solve for x
    x = 935,886.34/1,235.74
  6. Step 6: Final answer
    x = 757.35

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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.