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Finding the Fourth Proportional to 673.68, 934.68 and 644.88

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Solution

The fourth proportional to 673.68, 934.68 and 644.88 is: 894.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.68 : 934.68 = 644.88 : x
  2. Step 2: Convert to fraction form
    673.68/934.68 = 644.88/x
  3. Step 3: Cross multiply
    673.68x = 934.68 × 644.88
  4. Step 4: Simplify right side
    673.68x = 602,756.44
  5. Step 5: Solve for x
    x = 602,756.44/673.68
  6. Step 6: Final answer
    x = 894.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.