Home / 859,900.74-1,290,369.51-299,328.90

Finding the Fourth Proportional to 859,900.74, 1,290,369.51 and 299,328.90

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Solution

The fourth proportional to 859,900.74, 1,290,369.51 and 299,328.90 is: 449,173.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,900.74 : 1,290,369.51 = 299,328.90 : x
  2. Step 2: Convert to fraction form
    859,900.74/1,290,369.51 = 299,328.90/x
  3. Step 3: Cross multiply
    859,900.74x = 1,290,369.51 × 299,328.90
  4. Step 4: Simplify right side
    859,900.74x = 386,244,886,021.84
  5. Step 5: Solve for x
    x = 386,244,886,021.84/859,900.74
  6. Step 6: Final answer
    x = 449,173.80

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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.