Home / 780,358.78-1,076,982.54-440,848.90

Finding the Fourth Proportional to 780,358.78, 1,076,982.54 and 440,848.90

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Solution

The fourth proportional to 780,358.78, 1,076,982.54 and 440,848.90 is: 608,420.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,358.78 : 1,076,982.54 = 440,848.90 : x
  2. Step 2: Convert to fraction form
    780,358.78/1,076,982.54 = 440,848.90/x
  3. Step 3: Cross multiply
    780,358.78x = 1,076,982.54 × 440,848.90
  4. Step 4: Simplify right side
    780,358.78x = 474,786,568,078.21
  5. Step 5: Solve for x
    x = 474,786,568,078.21/780,358.78
  6. Step 6: Final answer
    x = 608,420.87

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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.