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Finding the Fourth Proportional to 672.21, 1,012.05 and 526.74

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Solution

The fourth proportional to 672.21, 1,012.05 and 526.74 is: 793.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.21 : 1,012.05 = 526.74 : x
  2. Step 2: Convert to fraction form
    672.21/1,012.05 = 526.74/x
  3. Step 3: Cross multiply
    672.21x = 1,012.05 × 526.74
  4. Step 4: Simplify right side
    672.21x = 533,087.22
  5. Step 5: Solve for x
    x = 533,087.22/672.21
  6. Step 6: Final answer
    x = 793.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.