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Finding the Fourth Proportional to 1,868.70, 2,803.05 and 896.70

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Solution

The fourth proportional to 1,868.70, 2,803.05 and 896.70 is: 1,345.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.70 : 2,803.05 = 896.70 : x
  2. Step 2: Convert to fraction form
    1,868.70/2,803.05 = 896.70/x
  3. Step 3: Cross multiply
    1,868.70x = 2,803.05 × 896.70
  4. Step 4: Simplify right side
    1,868.70x = 2,513,494.94
  5. Step 5: Solve for x
    x = 2,513,494.94/1,868.70
  6. Step 6: Final answer
    x = 1,345.05

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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.