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Finding the Fourth Proportional to 388,063.68, 535,522.56 and 218,297.60

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Solution

The fourth proportional to 388,063.68, 535,522.56 and 218,297.60 is: 301,247.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,063.68 : 535,522.56 = 218,297.60 : x
  2. Step 2: Convert to fraction form
    388,063.68/535,522.56 = 218,297.60/x
  3. Step 3: Cross multiply
    388,063.68x = 535,522.56 × 218,297.60
  4. Step 4: Simplify right side
    388,063.68x = 116,903,289,593.86
  5. Step 5: Solve for x
    x = 116,903,289,593.86/388,063.68
  6. Step 6: Final answer
    x = 301,247.70

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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.