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Finding the Fourth Proportional to 672.16, 929.04 and 620.32

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Solution

The fourth proportional to 672.16, 929.04 and 620.32 is: 857.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.16 : 929.04 = 620.32 : x
  2. Step 2: Convert to fraction form
    672.16/929.04 = 620.32/x
  3. Step 3: Cross multiply
    672.16x = 929.04 × 620.32
  4. Step 4: Simplify right side
    672.16x = 576,302.09
  5. Step 5: Solve for x
    x = 576,302.09/672.16
  6. Step 6: Final answer
    x = 857.39

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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.