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Finding the Fourth Proportional to 528,081.50, 728,798.56 and 289,663.58

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Solution

The fourth proportional to 528,081.50, 728,798.56 and 289,663.58 is: 399,761.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,081.50 : 728,798.56 = 289,663.58 : x
  2. Step 2: Convert to fraction form
    528,081.50/728,798.56 = 289,663.58/x
  3. Step 3: Cross multiply
    528,081.50x = 728,798.56 × 289,663.58
  4. Step 4: Simplify right side
    528,081.50x = 211,106,399,988.45
  5. Step 5: Solve for x
    x = 211,106,399,988.45/528,081.50
  6. Step 6: Final answer
    x = 399,761.02

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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.