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Finding the Fourth Proportional to 653.21, 895.59 and 641.52

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Solution

The fourth proportional to 653.21, 895.59 and 641.52 is: 879.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.21 : 895.59 = 641.52 : x
  2. Step 2: Convert to fraction form
    653.21/895.59 = 641.52/x
  3. Step 3: Cross multiply
    653.21x = 895.59 × 641.52
  4. Step 4: Simplify right side
    653.21x = 574,531.21
  5. Step 5: Solve for x
    x = 574,531.21/653.21
  6. Step 6: Final answer
    x = 879.55

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.