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Finding the Fourth Proportional to 895.43, 1,235.11 and 646.35

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Solution

The fourth proportional to 895.43, 1,235.11 and 646.35 is: 891.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.43 : 1,235.11 = 646.35 : x
  2. Step 2: Convert to fraction form
    895.43/1,235.11 = 646.35/x
  3. Step 3: Cross multiply
    895.43x = 1,235.11 × 646.35
  4. Step 4: Simplify right side
    895.43x = 798,313.35
  5. Step 5: Solve for x
    x = 798,313.35/895.43
  6. Step 6: Final answer
    x = 891.54

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Double scale
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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.