Home / 780,018.90-1,170,028.35-380,915.70

Finding the Fourth Proportional to 780,018.90, 1,170,028.35 and 380,915.70

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Solution

The fourth proportional to 780,018.90, 1,170,028.35 and 380,915.70 is: 571,373.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,018.90 : 1,170,028.35 = 380,915.70 : x
  2. Step 2: Convert to fraction form
    780,018.90/1,170,028.35 = 380,915.70/x
  3. Step 3: Cross multiply
    780,018.90x = 1,170,028.35 × 380,915.70
  4. Step 4: Simplify right side
    780,018.90x = 445,682,167,960.10
  5. Step 5: Solve for x
    x = 445,682,167,960.10/780,018.90
  6. Step 6: Final answer
    x = 571,373.55

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1.5x scale

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.