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Finding the Fourth Proportional to 388,860.75, 536,627.84 and 210,012.75

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Solution

The fourth proportional to 388,860.75, 536,627.84 and 210,012.75 is: 289,817.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,860.75 : 536,627.84 = 210,012.75 : x
  2. Step 2: Convert to fraction form
    388,860.75/536,627.84 = 210,012.75/x
  3. Step 3: Cross multiply
    388,860.75x = 536,627.84 × 210,012.75
  4. Step 4: Simplify right side
    388,860.75x = 112,698,687,354.90
  5. Step 5: Solve for x
    x = 112,698,687,354.90/388,860.75
  6. Step 6: Final answer
    x = 289,817.60

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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.