Home / 780,123.51-1,169,528.63-380,558.07

Finding the Fourth Proportional to 780,123.51, 1,169,528.63 and 380,558.07

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Solution

The fourth proportional to 780,123.51, 1,169,528.63 and 380,558.07 is: 570,516.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,123.51 : 1,169,528.63 = 380,558.07 : x
  2. Step 2: Convert to fraction form
    780,123.51/1,169,528.63 = 380,558.07/x
  3. Step 3: Cross multiply
    780,123.51x = 1,169,528.63 × 380,558.07
  4. Step 4: Simplify right side
    780,123.51x = 445,073,556,339.75
  5. Step 5: Solve for x
    x = 445,073,556,339.75/780,123.51
  6. Step 6: Final answer
    x = 570,516.78

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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.