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Finding the Fourth Proportional to 1,284.87, 1,772.88 and 761.03

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Solution

The fourth proportional to 1,284.87, 1,772.88 and 761.03 is: 1,050.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.87 : 1,772.88 = 761.03 : x
  2. Step 2: Convert to fraction form
    1,284.87/1,772.88 = 761.03/x
  3. Step 3: Cross multiply
    1,284.87x = 1,772.88 × 761.03
  4. Step 4: Simplify right side
    1,284.87x = 1,349,206.00
  5. Step 5: Solve for x
    x = 1,349,206.00/1,284.87
  6. Step 6: Final answer
    x = 1,050.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.