Home / 680,930.40-1,021,395.60-345,007.20

Finding the Fourth Proportional to 680,930.40, 1,021,395.60 and 345,007.20

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Solution

The fourth proportional to 680,930.40, 1,021,395.60 and 345,007.20 is: 517,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,930.40 : 1,021,395.60 = 345,007.20 : x
  2. Step 2: Convert to fraction form
    680,930.40/1,021,395.60 = 345,007.20/x
  3. Step 3: Cross multiply
    680,930.40x = 1,021,395.60 × 345,007.20
  4. Step 4: Simplify right side
    680,930.40x = 352,388,836,048.32
  5. Step 5: Solve for x
    x = 352,388,836,048.32/680,930.40
  6. Step 6: Final answer
    x = 517,510.80

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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.