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Finding the Fourth Proportional to 529,356.06, 730,509.77 and 287,639.37

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Solution

The fourth proportional to 529,356.06, 730,509.77 and 287,639.37 is: 396,941.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,356.06 : 730,509.77 = 287,639.37 : x
  2. Step 2: Convert to fraction form
    529,356.06/730,509.77 = 287,639.37/x
  3. Step 3: Cross multiply
    529,356.06x = 730,509.77 × 287,639.37
  4. Step 4: Simplify right side
    529,356.06x = 210,123,370,740.74
  5. Step 5: Solve for x
    x = 210,123,370,740.74/529,356.06
  6. Step 6: Final answer
    x = 396,941.47

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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.