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Finding the Fourth Proportional to 628,528.65, 867,389.11 and 356,608.00

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Solution

The fourth proportional to 628,528.65, 867,389.11 and 356,608.00 is: 492,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,528.65 : 867,389.11 = 356,608.00 : x
  2. Step 2: Convert to fraction form
    628,528.65/867,389.11 = 356,608.00/x
  3. Step 3: Cross multiply
    628,528.65x = 867,389.11 × 356,608.00
  4. Step 4: Simplify right side
    628,528.65x = 309,317,895,931.60
  5. Step 5: Solve for x
    x = 309,317,895,931.60/628,528.65
  6. Step 6: Final answer
    x = 492,130.15

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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.