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Finding the Fourth Proportional to 388,738.59, 536,475.60 and 216,656.66

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Solution

The fourth proportional to 388,738.59, 536,475.60 and 216,656.66 is: 298,995.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,738.59 : 536,475.60 = 216,656.66 : x
  2. Step 2: Convert to fraction form
    388,738.59/536,475.60 = 216,656.66/x
  3. Step 3: Cross multiply
    388,738.59x = 536,475.60 × 216,656.66
  4. Step 4: Simplify right side
    388,738.59x = 116,231,008,985.12
  5. Step 5: Solve for x
    x = 116,231,008,985.12/388,738.59
  6. Step 6: Final answer
    x = 298,995.29

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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.