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Finding the Fourth Proportional to 380,756.46, 525,442.50 and 210,990.46

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Solution

The fourth proportional to 380,756.46, 525,442.50 and 210,990.46 is: 291,166.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,756.46 : 525,442.50 = 210,990.46 : x
  2. Step 2: Convert to fraction form
    380,756.46/525,442.50 = 210,990.46/x
  3. Step 3: Cross multiply
    380,756.46x = 525,442.50 × 210,990.46
  4. Step 4: Simplify right side
    380,756.46x = 110,863,354,778.55
  5. Step 5: Solve for x
    x = 110,863,354,778.55/380,756.46
  6. Step 6: Final answer
    x = 291,166.05

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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.