Home / 1,272.93-1,756.18-1,007.45

Finding the Fourth Proportional to 1,272.93, 1,756.18 and 1,007.45

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Solution

The fourth proportional to 1,272.93, 1,756.18 and 1,007.45 is: 1,389.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.93 : 1,756.18 = 1,007.45 : x
  2. Step 2: Convert to fraction form
    1,272.93/1,756.18 = 1,007.45/x
  3. Step 3: Cross multiply
    1,272.93x = 1,756.18 × 1,007.45
  4. Step 4: Simplify right side
    1,272.93x = 1,769,263.54
  5. Step 5: Solve for x
    x = 1,769,263.54/1,272.93
  6. Step 6: Final answer
    x = 1,389.91

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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.