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Finding the Fourth Proportional to 528,072, 728,785.44 and 289,654.08

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Solution

The fourth proportional to 528,072, 728,785.44 and 289,654.08 is: 399,747.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,072 : 728,785.44 = 289,654.08 : x
  2. Step 2: Convert to fraction form
    528,072/728,785.44 = 289,654.08/x
  3. Step 3: Cross multiply
    528,072x = 728,785.44 × 289,654.08
  4. Step 4: Simplify right side
    528,072x = 211,095,676,140.60
  5. Step 5: Solve for x
    x = 211,095,676,140.60/528,072
  6. Step 6: Final answer
    x = 399,747.91

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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.