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Finding the Fourth Proportional to 1,355.58, 1,869.84 and 935.22

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Solution

The fourth proportional to 1,355.58, 1,869.84 and 935.22 is: 1,290.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.58 : 1,869.84 = 935.22 : x
  2. Step 2: Convert to fraction form
    1,355.58/1,869.84 = 935.22/x
  3. Step 3: Cross multiply
    1,355.58x = 1,869.84 × 935.22
  4. Step 4: Simplify right side
    1,355.58x = 1,748,711.76
  5. Step 5: Solve for x
    x = 1,748,711.76/1,355.58
  6. Step 6: Final answer
    x = 1,290.01

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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.