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Finding the Fourth Proportional to 388,883, 583,382.82 and 139,623.32

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Solution

The fourth proportional to 388,883, 583,382.82 and 139,623.32 is: 209,455.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,883 : 583,382.82 = 139,623.32 : x
  2. Step 2: Convert to fraction form
    388,883/583,382.82 = 139,623.32/x
  3. Step 3: Cross multiply
    388,883x = 583,382.82 × 139,623.32
  4. Step 4: Simplify right side
    388,883x = 81,453,846,159.36
  5. Step 5: Solve for x
    x = 81,453,846,159.36/388,883
  6. Step 6: Final answer
    x = 209,455.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.