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Finding the Fourth Proportional to 1,650.74, 2,277.48 and 987.50

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Solution

The fourth proportional to 1,650.74, 2,277.48 and 987.50 is: 1,362.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,650.74 : 2,277.48 = 987.50 : x
  2. Step 2: Convert to fraction form
    1,650.74/2,277.48 = 987.50/x
  3. Step 3: Cross multiply
    1,650.74x = 2,277.48 × 987.50
  4. Step 4: Simplify right side
    1,650.74x = 2,249,011.50
  5. Step 5: Solve for x
    x = 2,249,011.50/1,650.74
  6. Step 6: Final answer
    x = 1,362.43

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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.