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Finding the Fourth Proportional to 3,485.70, 4,810.10 and 1,913.76

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Solution

The fourth proportional to 3,485.70, 4,810.10 and 1,913.76 is: 2,640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.70 : 4,810.10 = 1,913.76 : x
  2. Step 2: Convert to fraction form
    3,485.70/4,810.10 = 1,913.76/x
  3. Step 3: Cross multiply
    3,485.70x = 4,810.10 × 1,913.76
  4. Step 4: Simplify right side
    3,485.70x = 9,205,376.98
  5. Step 5: Solve for x
    x = 9,205,376.98/3,485.70
  6. Step 6: Final answer
    x = 2,640.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.