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Finding the Fourth Proportional to 1,352.96, 1,869.80 and 1,021.26

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Solution

The fourth proportional to 1,352.96, 1,869.80 and 1,021.26 is: 1,411.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.96 : 1,869.80 = 1,021.26 : x
  2. Step 2: Convert to fraction form
    1,352.96/1,869.80 = 1,021.26/x
  3. Step 3: Cross multiply
    1,352.96x = 1,869.80 × 1,021.26
  4. Step 4: Simplify right side
    1,352.96x = 1,909,551.95
  5. Step 5: Solve for x
    x = 1,909,551.95/1,352.96
  6. Step 6: Final answer
    x = 1,411.39

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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.