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Finding the Fourth Proportional to 673.79, 1,005.74 and 626.79

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Solution

The fourth proportional to 673.79, 1,005.74 and 626.79 is: 935.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.79 : 1,005.74 = 626.79 : x
  2. Step 2: Convert to fraction form
    673.79/1,005.74 = 626.79/x
  3. Step 3: Cross multiply
    673.79x = 1,005.74 × 626.79
  4. Step 4: Simplify right side
    673.79x = 630,387.77
  5. Step 5: Solve for x
    x = 630,387.77/673.79
  6. Step 6: Final answer
    x = 935.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.