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Finding the Fourth Proportional to 388,773.20, 536,441.95 and 216,653.40

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Solution

The fourth proportional to 388,773.20, 536,441.95 and 216,653.40 is: 298,945.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,773.20 : 536,441.95 = 216,653.40 : x
  2. Step 2: Convert to fraction form
    388,773.20/536,441.95 = 216,653.40/x
  3. Step 3: Cross multiply
    388,773.20x = 536,441.95 × 216,653.40
  4. Step 4: Simplify right side
    388,773.20x = 116,221,971,828.50
  5. Step 5: Solve for x
    x = 116,221,971,828.50/388,773.20
  6. Step 6: Final answer
    x = 298,945.43

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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.