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Finding the Fourth Proportional to 388,269.45, 578,302.13 and 370,993.77

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Solution

The fourth proportional to 388,269.45, 578,302.13 and 370,993.77 is: 552,571.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,269.45 : 578,302.13 = 370,993.77 : x
  2. Step 2: Convert to fraction form
    388,269.45/578,302.13 = 370,993.77/x
  3. Step 3: Cross multiply
    388,269.45x = 578,302.13 × 370,993.77
  4. Step 4: Simplify right side
    388,269.45x = 214,546,488,335.22
  5. Step 5: Solve for x
    x = 214,546,488,335.22/388,269.45
  6. Step 6: Final answer
    x = 552,571.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.