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Finding the Fourth Proportional to 1,931.25, 2,897.36 and 891.98

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Solution

The fourth proportional to 1,931.25, 2,897.36 and 891.98 is: 1,338.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.25 : 2,897.36 = 891.98 : x
  2. Step 2: Convert to fraction form
    1,931.25/2,897.36 = 891.98/x
  3. Step 3: Cross multiply
    1,931.25x = 2,897.36 × 891.98
  4. Step 4: Simplify right side
    1,931.25x = 2,584,382.44
  5. Step 5: Solve for x
    x = 2,584,382.44/1,931.25
  6. Step 6: Final answer
    x = 1,338.19

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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.