Home / 630,571.10-869,960.66-485,421.26

Finding the Fourth Proportional to 630,571.10, 869,960.66 and 485,421.26

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Solution

The fourth proportional to 630,571.10, 869,960.66 and 485,421.26 is: 669,706.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,571.10 : 869,960.66 = 485,421.26 : x
  2. Step 2: Convert to fraction form
    630,571.10/869,960.66 = 485,421.26/x
  3. Step 3: Cross multiply
    630,571.10x = 869,960.66 × 485,421.26
  4. Step 4: Simplify right side
    630,571.10x = 422,297,392,950.72
  5. Step 5: Solve for x
    x = 422,297,392,950.72/630,571.10
  6. Step 6: Final answer
    x = 669,706.23

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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.