Home / 2,128,516.12-3,190,875.93-780,364.58

Finding the Fourth Proportional to 2,128,516.12, 3,190,875.93 and 780,364.58

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Solution

The fourth proportional to 2,128,516.12, 3,190,875.93 and 780,364.58 is: 1,169,850.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128,516.12 : 3,190,875.93 = 780,364.58 : x
  2. Step 2: Convert to fraction form
    2,128,516.12/3,190,875.93 = 780,364.58/x
  3. Step 3: Cross multiply
    2,128,516.12x = 3,190,875.93 × 780,364.58
  4. Step 4: Simplify right side
    2,128,516.12x = 2,490,046,540,455.36
  5. Step 5: Solve for x
    x = 2,490,046,540,455.36/2,128,516.12
  6. Step 6: Final answer
    x = 1,169,850.92

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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.