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Finding the Fourth Proportional to 388,178.99, 535,702.71 and 216,104.01

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Solution

The fourth proportional to 388,178.99, 535,702.71 and 216,104.01 is: 298,232.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,178.99 : 535,702.71 = 216,104.01 : x
  2. Step 2: Convert to fraction form
    388,178.99/535,702.71 = 216,104.01/x
  3. Step 3: Cross multiply
    388,178.99x = 535,702.71 × 216,104.01
  4. Step 4: Simplify right side
    388,178.99x = 115,767,503,798.87
  5. Step 5: Solve for x
    x = 115,767,503,798.87/388,178.99
  6. Step 6: Final answer
    x = 298,232.28

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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.