Home / 1,286,870.40-1,930,320.18-388,320.80

Finding the Fourth Proportional to 1,286,870.40, 1,930,320.18 and 388,320.80

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Solution

The fourth proportional to 1,286,870.40, 1,930,320.18 and 388,320.80 is: 582,485.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,870.40 : 1,930,320.18 = 388,320.80 : x
  2. Step 2: Convert to fraction form
    1,286,870.40/1,930,320.18 = 388,320.80/x
  3. Step 3: Cross multiply
    1,286,870.40x = 1,930,320.18 × 388,320.80
  4. Step 4: Simplify right side
    1,286,870.40x = 749,583,466,902.14
  5. Step 5: Solve for x
    x = 749,583,466,902.14/1,286,870.40
  6. Step 6: Final answer
    x = 582,485.59

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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.