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Finding the Fourth Proportional to 1,007.12, 1,510.71 and 276.75

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Solution

The fourth proportional to 1,007.12, 1,510.71 and 276.75 is: 415.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.12 : 1,510.71 = 276.75 : x
  2. Step 2: Convert to fraction form
    1,007.12/1,510.71 = 276.75/x
  3. Step 3: Cross multiply
    1,007.12x = 1,510.71 × 276.75
  4. Step 4: Simplify right side
    1,007.12x = 418,089.51
  5. Step 5: Solve for x
    x = 418,089.51/1,007.12
  6. Step 6: Final answer
    x = 415.14

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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.