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Finding the Fourth Proportional to 388,968.06, 536,775.12 and 210,120.06

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Solution

The fourth proportional to 388,968.06, 536,775.12 and 210,120.06 is: 289,965.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,968.06 : 536,775.12 = 210,120.06 : x
  2. Step 2: Convert to fraction form
    388,968.06/536,775.12 = 210,120.06/x
  3. Step 3: Cross multiply
    388,968.06x = 536,775.12 × 210,120.06
  4. Step 4: Simplify right side
    388,968.06x = 112,787,220,420.91
  5. Step 5: Solve for x
    x = 112,787,220,420.91/388,968.06
  6. Step 6: Final answer
    x = 289,965.25

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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.