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Finding the Fourth Proportional to 895.61, 1,344.28 and 485.62

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Solution

The fourth proportional to 895.61, 1,344.28 and 485.62 is: 728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.61 : 1,344.28 = 485.62 : x
  2. Step 2: Convert to fraction form
    895.61/1,344.28 = 485.62/x
  3. Step 3: Cross multiply
    895.61x = 1,344.28 × 485.62
  4. Step 4: Simplify right side
    895.61x = 652,809.25
  5. Step 5: Solve for x
    x = 652,809.25/895.61
  6. Step 6: Final answer
    x = 728.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.