Home / 811,612.89-1,120,384.52-485,041.11

Finding the Fourth Proportional to 811,612.89, 1,120,384.52 and 485,041.11

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Solution

The fourth proportional to 811,612.89, 1,120,384.52 and 485,041.11 is: 669,571.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,612.89 : 1,120,384.52 = 485,041.11 : x
  2. Step 2: Convert to fraction form
    811,612.89/1,120,384.52 = 485,041.11/x
  3. Step 3: Cross multiply
    811,612.89x = 1,120,384.52 × 485,041.11
  4. Step 4: Simplify right side
    811,612.89x = 543,432,548,782.41
  5. Step 5: Solve for x
    x = 543,432,548,782.41/811,612.89
  6. Step 6: Final answer
    x = 669,571.12

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Double scale
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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.