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Finding the Fourth Proportional to 895.13, 1,235.39 and 647.27

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Solution

The fourth proportional to 895.13, 1,235.39 and 647.27 is: 893.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.13 : 1,235.39 = 647.27 : x
  2. Step 2: Convert to fraction form
    895.13/1,235.39 = 647.27/x
  3. Step 3: Cross multiply
    895.13x = 1,235.39 × 647.27
  4. Step 4: Simplify right side
    895.13x = 799,621.47
  5. Step 5: Solve for x
    x = 799,621.47/895.13
  6. Step 6: Final answer
    x = 893.31

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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.