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Finding the Fourth Proportional to 1,112.60, 1,535.36 and 670.28

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Solution

The fourth proportional to 1,112.60, 1,535.36 and 670.28 is: 924.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.60 : 1,535.36 = 670.28 : x
  2. Step 2: Convert to fraction form
    1,112.60/1,535.36 = 670.28/x
  3. Step 3: Cross multiply
    1,112.60x = 1,535.36 × 670.28
  4. Step 4: Simplify right side
    1,112.60x = 1,029,110.07
  5. Step 5: Solve for x
    x = 1,029,110.07/1,112.60
  6. Step 6: Final answer
    x = 924.96

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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.