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Finding the Fourth Proportional to 1,485.98, 2,228.50 and 705.74

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Solution

The fourth proportional to 1,485.98, 2,228.50 and 705.74 is: 1,058.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.98 : 2,228.50 = 705.74 : x
  2. Step 2: Convert to fraction form
    1,485.98/2,228.50 = 705.74/x
  3. Step 3: Cross multiply
    1,485.98x = 2,228.50 × 705.74
  4. Step 4: Simplify right side
    1,485.98x = 1,572,745.40
  5. Step 5: Solve for x
    x = 1,572,745.40/1,485.98
  6. Step 6: Final answer
    x = 1,058.39

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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.