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Finding the Fourth Proportional to 388,692.87, 536,388.87 and 216,607.05

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Solution

The fourth proportional to 388,692.87, 536,388.87 and 216,607.05 is: 298,913.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,692.87 : 536,388.87 = 216,607.05 : x
  2. Step 2: Convert to fraction form
    388,692.87/536,388.87 = 216,607.05/x
  3. Step 3: Cross multiply
    388,692.87x = 536,388.87 × 216,607.05
  4. Step 4: Simplify right side
    388,692.87x = 116,185,609,405.47
  5. Step 5: Solve for x
    x = 116,185,609,405.47/388,692.87
  6. Step 6: Final answer
    x = 298,913.66

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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.