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Finding the Fourth Proportional to 388,559.70, 536,221.35 and 216,489.06

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Solution

The fourth proportional to 388,559.70, 536,221.35 and 216,489.06 is: 298,759.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,559.70 : 536,221.35 = 216,489.06 : x
  2. Step 2: Convert to fraction form
    388,559.70/536,221.35 = 216,489.06/x
  3. Step 3: Cross multiply
    388,559.70x = 536,221.35 × 216,489.06
  4. Step 4: Simplify right side
    388,559.70x = 116,086,056,013.43
  5. Step 5: Solve for x
    x = 116,086,056,013.43/388,559.70
  6. Step 6: Final answer
    x = 298,759.90

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1.5x scale

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.