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Finding the Fourth Proportional to 673.30, 929.15 and 378.57

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Solution

The fourth proportional to 673.30, 929.15 and 378.57 is: 522.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.30 : 929.15 = 378.57 : x
  2. Step 2: Convert to fraction form
    673.30/929.15 = 378.57/x
  3. Step 3: Cross multiply
    673.30x = 929.15 × 378.57
  4. Step 4: Simplify right side
    673.30x = 351,746.10
  5. Step 5: Solve for x
    x = 351,746.10/673.30
  6. Step 6: Final answer
    x = 522.42

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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.