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Finding the Fourth Proportional to 1,515.39, 2,091.32 and 885.93

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Solution

The fourth proportional to 1,515.39, 2,091.32 and 885.93 is: 1,222.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.39 : 2,091.32 = 885.93 : x
  2. Step 2: Convert to fraction form
    1,515.39/2,091.32 = 885.93/x
  3. Step 3: Cross multiply
    1,515.39x = 2,091.32 × 885.93
  4. Step 4: Simplify right side
    1,515.39x = 1,852,763.13
  5. Step 5: Solve for x
    x = 1,852,763.13/1,515.39
  6. Step 6: Final answer
    x = 1,222.63

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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.