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Finding the Fourth Proportional to 388,915.50, 536,703.75 and 210,067.50

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Solution

The fourth proportional to 388,915.50, 536,703.75 and 210,067.50 is: 289,893.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,915.50 : 536,703.75 = 210,067.50 : x
  2. Step 2: Convert to fraction form
    388,915.50/536,703.75 = 210,067.50/x
  3. Step 3: Cross multiply
    388,915.50x = 536,703.75 × 210,067.50
  4. Step 4: Simplify right side
    388,915.50x = 112,744,015,003.13
  5. Step 5: Solve for x
    x = 112,744,015,003.13/388,915.50
  6. Step 6: Final answer
    x = 289,893.34

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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.