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Finding the Fourth Proportional to 4,901.85, 7,354.94 and 1,985.85

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Solution

The fourth proportional to 4,901.85, 7,354.94 and 1,985.85 is: 2,979.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,901.85 : 7,354.94 = 1,985.85 : x
  2. Step 2: Convert to fraction form
    4,901.85/7,354.94 = 1,985.85/x
  3. Step 3: Cross multiply
    4,901.85x = 7,354.94 × 1,985.85
  4. Step 4: Simplify right side
    4,901.85x = 14,605,797.67
  5. Step 5: Solve for x
    x = 14,605,797.67/4,901.85
  6. Step 6: Final answer
    x = 2,979.65

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1.5x scale

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.