Home / 1,289,456.80-1,934,201.40-390,907.60

Finding the Fourth Proportional to 1,289,456.80, 1,934,201.40 and 390,907.60

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Solution

The fourth proportional to 1,289,456.80, 1,934,201.40 and 390,907.60 is: 586,366.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,456.80 : 1,934,201.40 = 390,907.60 : x
  2. Step 2: Convert to fraction form
    1,289,456.80/1,934,201.40 = 390,907.60/x
  3. Step 3: Cross multiply
    1,289,456.80x = 1,934,201.40 × 390,907.60
  4. Step 4: Simplify right side
    1,289,456.80x = 756,094,027,190.64
  5. Step 5: Solve for x
    x = 756,094,027,190.64/1,289,456.80
  6. Step 6: Final answer
    x = 586,366.31

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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.