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Finding the Fourth Proportional to 529,328.47, 730,477.74 and 287,611.05

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Solution

The fourth proportional to 529,328.47, 730,477.74 and 287,611.05 is: 396,905.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,328.47 : 730,477.74 = 287,611.05 : x
  2. Step 2: Convert to fraction form
    529,328.47/730,477.74 = 287,611.05/x
  3. Step 3: Cross multiply
    529,328.47x = 730,477.74 × 287,611.05
  4. Step 4: Simplify right side
    529,328.47x = 210,093,468,183.93
  5. Step 5: Solve for x
    x = 210,093,468,183.93/529,328.47
  6. Step 6: Final answer
    x = 396,905.66

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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.