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Finding the Fourth Proportional to 895.10, 1,234.88 and 685.04

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Solution

The fourth proportional to 895.10, 1,234.88 and 685.04 is: 945.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.10 : 1,234.88 = 685.04 : x
  2. Step 2: Convert to fraction form
    895.10/1,234.88 = 685.04/x
  3. Step 3: Cross multiply
    895.10x = 1,234.88 × 685.04
  4. Step 4: Simplify right side
    895.10x = 845,942.20
  5. Step 5: Solve for x
    x = 845,942.20/895.10
  6. Step 6: Final answer
    x = 945.08

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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.