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Finding the Fourth Proportional to 528,073, 728,786.82 and 289,655.08

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Solution

The fourth proportional to 528,073, 728,786.82 and 289,655.08 is: 399,749.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,073 : 728,786.82 = 289,655.08 : x
  2. Step 2: Convert to fraction form
    528,073/728,786.82 = 289,655.08/x
  3. Step 3: Cross multiply
    528,073x = 728,786.82 × 289,655.08
  4. Step 4: Simplify right side
    528,073x = 211,096,804,650.05
  5. Step 5: Solve for x
    x = 211,096,804,650.05/528,073
  6. Step 6: Final answer
    x = 399,749.29

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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.