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Finding the Fourth Proportional to 1,991.07, 2,985.57 and 894.49

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Solution

The fourth proportional to 1,991.07, 2,985.57 and 894.49 is: 1,341.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.07 : 2,985.57 = 894.49 : x
  2. Step 2: Convert to fraction form
    1,991.07/2,985.57 = 894.49/x
  3. Step 3: Cross multiply
    1,991.07x = 2,985.57 × 894.49
  4. Step 4: Simplify right side
    1,991.07x = 2,670,565.50
  5. Step 5: Solve for x
    x = 2,670,565.50/1,991.07
  6. Step 6: Final answer
    x = 1,341.27

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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.