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Finding the Fourth Proportional to 1,433.84, 2,150.75 and 947.84

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Solution

The fourth proportional to 1,433.84, 2,150.75 and 947.84 is: 1,421.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433.84 : 2,150.75 = 947.84 : x
  2. Step 2: Convert to fraction form
    1,433.84/2,150.75 = 947.84/x
  3. Step 3: Cross multiply
    1,433.84x = 2,150.75 × 947.84
  4. Step 4: Simplify right side
    1,433.84x = 2,038,558.50
  5. Step 5: Solve for x
    x = 2,038,558.50/1,433.84
  6. Step 6: Final answer
    x = 1,421.75

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1.5x scale

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.