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Finding the Fourth Proportional to 957.78, 1,435.86 and 437.60

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Solution

The fourth proportional to 957.78, 1,435.86 and 437.60 is: 656.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.78 : 1,435.86 = 437.60 : x
  2. Step 2: Convert to fraction form
    957.78/1,435.86 = 437.60/x
  3. Step 3: Cross multiply
    957.78x = 1,435.86 × 437.60
  4. Step 4: Simplify right side
    957.78x = 628,325.16
  5. Step 5: Solve for x
    x = 628,325.16/957.78
  6. Step 6: Final answer
    x = 656.02

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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.