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Finding the Fourth Proportional to 1,427.30, 1,969.63 and 888.71

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Solution

The fourth proportional to 1,427.30, 1,969.63 and 888.71 is: 1,226.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.30 : 1,969.63 = 888.71 : x
  2. Step 2: Convert to fraction form
    1,427.30/1,969.63 = 888.71/x
  3. Step 3: Cross multiply
    1,427.30x = 1,969.63 × 888.71
  4. Step 4: Simplify right side
    1,427.30x = 1,750,417.81
  5. Step 5: Solve for x
    x = 1,750,417.81/1,427.30
  6. Step 6: Final answer
    x = 1,226.39

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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.