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Finding the Fourth Proportional to 1,327.79, 1,829.19 and 928.71

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Solution

The fourth proportional to 1,327.79, 1,829.19 and 928.71 is: 1,279.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.79 : 1,829.19 = 928.71 : x
  2. Step 2: Convert to fraction form
    1,327.79/1,829.19 = 928.71/x
  3. Step 3: Cross multiply
    1,327.79x = 1,829.19 × 928.71
  4. Step 4: Simplify right side
    1,327.79x = 1,698,787.04
  5. Step 5: Solve for x
    x = 1,698,787.04/1,327.79
  6. Step 6: Final answer
    x = 1,279.41

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1.5x scale

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.