Home / 677,439.45-934,988.27-390,919.77

Finding the Fourth Proportional to 677,439.45, 934,988.27 and 390,919.77

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Solution

The fourth proportional to 677,439.45, 934,988.27 and 390,919.77 is: 539,539.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,439.45 : 934,988.27 = 390,919.77 : x
  2. Step 2: Convert to fraction form
    677,439.45/934,988.27 = 390,919.77/x
  3. Step 3: Cross multiply
    677,439.45x = 934,988.27 × 390,919.77
  4. Step 4: Simplify right side
    677,439.45x = 365,505,397,506.50
  5. Step 5: Solve for x
    x = 365,505,397,506.50/677,439.45
  6. Step 6: Final answer
    x = 539,539.58

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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.