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Finding the Fourth Proportional to 355,611.20, 533,416.80 and 118,875.20

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Solution

The fourth proportional to 355,611.20, 533,416.80 and 118,875.20 is: 178,312.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,611.20 : 533,416.80 = 118,875.20 : x
  2. Step 2: Convert to fraction form
    355,611.20/533,416.80 = 118,875.20/x
  3. Step 3: Cross multiply
    355,611.20x = 533,416.80 × 118,875.20
  4. Step 4: Simplify right side
    355,611.20x = 63,410,028,783.36
  5. Step 5: Solve for x
    x = 63,410,028,783.36/355,611.20
  6. Step 6: Final answer
    x = 178,312.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.