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Finding the Fourth Proportional to 388,726.01, 536,485.44 and 216,659.68

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Solution

The fourth proportional to 388,726.01, 536,485.44 and 216,659.68 is: 299,014.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,726.01 : 536,485.44 = 216,659.68 : x
  2. Step 2: Convert to fraction form
    388,726.01/536,485.44 = 216,659.68/x
  3. Step 3: Cross multiply
    388,726.01x = 536,485.44 × 216,659.68
  4. Step 4: Simplify right side
    388,726.01x = 116,234,764,425.67
  5. Step 5: Solve for x
    x = 116,234,764,425.67/388,726.01
  6. Step 6: Final answer
    x = 299,014.63

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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.