Home / 1,293.19-1,783.80-788.81

Finding the Fourth Proportional to 1,293.19, 1,783.80 and 788.81

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Solution

The fourth proportional to 1,293.19, 1,783.80 and 788.81 is: 1,088.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.19 : 1,783.80 = 788.81 : x
  2. Step 2: Convert to fraction form
    1,293.19/1,783.80 = 788.81/x
  3. Step 3: Cross multiply
    1,293.19x = 1,783.80 × 788.81
  4. Step 4: Simplify right side
    1,293.19x = 1,407,083.19
  5. Step 5: Solve for x
    x = 1,407,083.19/1,293.19
  6. Step 6: Final answer
    x = 1,088.07

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1.5x scale

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.