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Finding the Fourth Proportional to 1,409.60, 1,945.80 and 1,262

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Solution

The fourth proportional to 1,409.60, 1,945.80 and 1,262 is: 1,742.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.60 : 1,945.80 = 1,262 : x
  2. Step 2: Convert to fraction form
    1,409.60/1,945.80 = 1,262/x
  3. Step 3: Cross multiply
    1,409.60x = 1,945.80 × 1,262
  4. Step 4: Simplify right side
    1,409.60x = 2,455,599.60
  5. Step 5: Solve for x
    x = 2,455,599.60/1,409.60
  6. Step 6: Final answer
    x = 1,742.05

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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.