Home / 645,028.65-890,086.88-379,772.40

Finding the Fourth Proportional to 645,028.65, 890,086.88 and 379,772.40

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Solution

The fourth proportional to 645,028.65, 890,086.88 and 379,772.40 is: 524,054.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,028.65 : 890,086.88 = 379,772.40 : x
  2. Step 2: Convert to fraction form
    645,028.65/890,086.88 = 379,772.40/x
  3. Step 3: Cross multiply
    645,028.65x = 890,086.88 × 379,772.40
  4. Step 4: Simplify right side
    645,028.65x = 338,030,431,575.54
  5. Step 5: Solve for x
    x = 338,030,431,575.54/645,028.65
  6. Step 6: Final answer
    x = 524,054.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.