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Finding the Fourth Proportional to 528,057.10, 728,717.34 and 286,338.93

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Solution

The fourth proportional to 528,057.10, 728,717.34 and 286,338.93 is: 395,146.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,057.10 : 728,717.34 = 286,338.93 : x
  2. Step 2: Convert to fraction form
    528,057.10/728,717.34 = 286,338.93/x
  3. Step 3: Cross multiply
    528,057.10x = 728,717.34 × 286,338.93
  4. Step 4: Simplify right side
    528,057.10x = 208,660,143,408.05
  5. Step 5: Solve for x
    x = 208,660,143,408.05/528,057.10
  6. Step 6: Final answer
    x = 395,146.93

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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.