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Finding the Fourth Proportional to 957.16, 1,435.76 and 678.36

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Solution

The fourth proportional to 957.16, 1,435.76 and 678.36 is: 1,017.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.16 : 1,435.76 = 678.36 : x
  2. Step 2: Convert to fraction form
    957.16/1,435.76 = 678.36/x
  3. Step 3: Cross multiply
    957.16x = 1,435.76 × 678.36
  4. Step 4: Simplify right side
    957.16x = 973,962.15
  5. Step 5: Solve for x
    x = 973,962.15/957.16
  6. Step 6: Final answer
    x = 1,017.55

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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.