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Finding the Fourth Proportional to 1,354.79, 2,032.53 and 380.90

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Solution

The fourth proportional to 1,354.79, 2,032.53 and 380.90 is: 571.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.79 : 2,032.53 = 380.90 : x
  2. Step 2: Convert to fraction form
    1,354.79/2,032.53 = 380.90/x
  3. Step 3: Cross multiply
    1,354.79x = 2,032.53 × 380.90
  4. Step 4: Simplify right side
    1,354.79x = 774,190.68
  5. Step 5: Solve for x
    x = 774,190.68/1,354.79
  6. Step 6: Final answer
    x = 571.45

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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.