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Finding the Fourth Proportional to 528,080, 728,796.48 and 289,662.08

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Solution

The fourth proportional to 528,080, 728,796.48 and 289,662.08 is: 399,758.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,080 : 728,796.48 = 289,662.08 : x
  2. Step 2: Convert to fraction form
    528,080/728,796.48 = 289,662.08/x
  3. Step 3: Cross multiply
    528,080x = 728,796.48 × 289,662.08
  4. Step 4: Simplify right side
    528,080x = 211,104,704,293.48
  5. Step 5: Solve for x
    x = 211,104,704,293.48/528,080
  6. Step 6: Final answer
    x = 399,758.95

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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.