Home / 677,144.12-934,422.90-390,647.12

Finding the Fourth Proportional to 677,144.12, 934,422.90 and 390,647.12

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Solution

The fourth proportional to 677,144.12, 934,422.90 and 390,647.12 is: 539,072.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,144.12 : 934,422.90 = 390,647.12 : x
  2. Step 2: Convert to fraction form
    677,144.12/934,422.90 = 390,647.12/x
  3. Step 3: Cross multiply
    677,144.12x = 934,422.90 × 390,647.12
  4. Step 4: Simplify right side
    677,144.12x = 365,029,614,747.05
  5. Step 5: Solve for x
    x = 365,029,614,747.05/677,144.12
  6. Step 6: Final answer
    x = 539,072.27

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1.5x scale

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.