Home / 1,289,860.80-1,934,807.40-391,311.60

Finding the Fourth Proportional to 1,289,860.80, 1,934,807.40 and 391,311.60

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Solution

The fourth proportional to 1,289,860.80, 1,934,807.40 and 391,311.60 is: 586,972.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,860.80 : 1,934,807.40 = 391,311.60 : x
  2. Step 2: Convert to fraction form
    1,289,860.80/1,934,807.40 = 391,311.60/x
  3. Step 3: Cross multiply
    1,289,860.80x = 1,934,807.40 × 391,311.60
  4. Step 4: Simplify right side
    1,289,860.80x = 757,112,579,385.84
  5. Step 5: Solve for x
    x = 757,112,579,385.84/1,289,860.80
  6. Step 6: Final answer
    x = 586,972.31

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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.