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Finding the Fourth Proportional to 738.58, 1,020.27 and 672.07

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Solution

The fourth proportional to 738.58, 1,020.27 and 672.07 is: 928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.58 : 1,020.27 = 672.07 : x
  2. Step 2: Convert to fraction form
    738.58/1,020.27 = 672.07/x
  3. Step 3: Cross multiply
    738.58x = 1,020.27 × 672.07
  4. Step 4: Simplify right side
    738.58x = 685,692.86
  5. Step 5: Solve for x
    x = 685,692.86/738.58
  6. Step 6: Final answer
    x = 928.40

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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.