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Finding the Fourth Proportional to 620,883.16, 857,028.54 and 403,389.40

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Solution

The fourth proportional to 620,883.16, 857,028.54 and 403,389.40 is: 556,813.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,883.16 : 857,028.54 = 403,389.40 : x
  2. Step 2: Convert to fraction form
    620,883.16/857,028.54 = 403,389.40/x
  3. Step 3: Cross multiply
    620,883.16x = 857,028.54 × 403,389.40
  4. Step 4: Simplify right side
    620,883.16x = 345,716,228,533.48
  5. Step 5: Solve for x
    x = 345,716,228,533.48/620,883.16
  6. Step 6: Final answer
    x = 556,813.67

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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.