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Finding the Fourth Proportional to 607,986.06, 839,136.69 and 400,890.30

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Solution

The fourth proportional to 607,986.06, 839,136.69 and 400,890.30 is: 553,305.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,986.06 : 839,136.69 = 400,890.30 : x
  2. Step 2: Convert to fraction form
    607,986.06/839,136.69 = 400,890.30/x
  3. Step 3: Cross multiply
    607,986.06x = 839,136.69 × 400,890.30
  4. Step 4: Simplify right side
    607,986.06x = 336,401,759,395.11
  5. Step 5: Solve for x
    x = 336,401,759,395.11/607,986.06
  6. Step 6: Final answer
    x = 553,305.05

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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.