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Finding the Fourth Proportional to 528,865.75, 728,527.42 and 451,088.02

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Solution

The fourth proportional to 528,865.75, 728,527.42 and 451,088.02 is: 621,386.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,865.75 : 728,527.42 = 451,088.02 : x
  2. Step 2: Convert to fraction form
    528,865.75/728,527.42 = 451,088.02/x
  3. Step 3: Cross multiply
    528,865.75x = 728,527.42 × 451,088.02
  4. Step 4: Simplify right side
    528,865.75x = 328,629,991,403.51
  5. Step 5: Solve for x
    x = 328,629,991,403.51/528,865.75
  6. Step 6: Final answer
    x = 621,386.41

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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.