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Finding the Fourth Proportional to 648.63, 895.04 and 353.88

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Solution

The fourth proportional to 648.63, 895.04 and 353.88 is: 488.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.63 : 895.04 = 353.88 : x
  2. Step 2: Convert to fraction form
    648.63/895.04 = 353.88/x
  3. Step 3: Cross multiply
    648.63x = 895.04 × 353.88
  4. Step 4: Simplify right side
    648.63x = 316,736.31
  5. Step 5: Solve for x
    x = 316,736.31/648.63
  6. Step 6: Final answer
    x = 488.32

Related Problems

Find fourth proportional to 324.32, 447.52 and 176.94
Half scale
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Double scale
Find fourth proportional to 649.63, 896.42 and 354.88
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.