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Finding the Fourth Proportional to 648.63, 895.11 and 353.91

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Solution

The fourth proportional to 648.63, 895.11 and 353.91 is: 488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.63 : 895.11 = 353.91 : x
  2. Step 2: Convert to fraction form
    648.63/895.11 = 353.91/x
  3. Step 3: Cross multiply
    648.63x = 895.11 × 353.91
  4. Step 4: Simplify right side
    648.63x = 316,788.38
  5. Step 5: Solve for x
    x = 316,788.38/648.63
  6. Step 6: Final answer
    x = 488.40

Related Problems

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Half scale
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Double scale
Find fourth proportional to 649.63, 896.49 and 354.91
Similar ratio
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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.