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Finding the Fourth Proportional to 455,621.60, 683,428.80 and 118,661.60

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Solution

The fourth proportional to 455,621.60, 683,428.80 and 118,661.60 is: 177,991.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,621.60 : 683,428.80 = 118,661.60 : x
  2. Step 2: Convert to fraction form
    455,621.60/683,428.80 = 118,661.60/x
  3. Step 3: Cross multiply
    455,621.60x = 683,428.80 × 118,661.60
  4. Step 4: Simplify right side
    455,621.60x = 81,096,754,894.08
  5. Step 5: Solve for x
    x = 81,096,754,894.08/455,621.60
  6. Step 6: Final answer
    x = 177,991.46

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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.