Home / 1,112.40-1,667.52-1,047.60

Finding the Fourth Proportional to 1,112.40, 1,667.52 and 1,047.60

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Solution

The fourth proportional to 1,112.40, 1,667.52 and 1,047.60 is: 1,570.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.40 : 1,667.52 = 1,047.60 : x
  2. Step 2: Convert to fraction form
    1,112.40/1,667.52 = 1,047.60/x
  3. Step 3: Cross multiply
    1,112.40x = 1,667.52 × 1,047.60
  4. Step 4: Simplify right side
    1,112.40x = 1,746,893.95
  5. Step 5: Solve for x
    x = 1,746,893.95/1,112.40
  6. Step 6: Final answer
    x = 1,570.38

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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.