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Finding the Fourth Proportional to 895.72, 1,235.72 and 646.49

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Solution

The fourth proportional to 895.72, 1,235.72 and 646.49 is: 891.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.72 : 1,235.72 = 646.49 : x
  2. Step 2: Convert to fraction form
    895.72/1,235.72 = 646.49/x
  3. Step 3: Cross multiply
    895.72x = 1,235.72 × 646.49
  4. Step 4: Simplify right side
    895.72x = 798,884.34
  5. Step 5: Solve for x
    x = 798,884.34/895.72
  6. Step 6: Final answer
    x = 891.89

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Double scale
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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.