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Finding the Fourth Proportional to 895.54, 1,235.39 and 580.40

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Solution

The fourth proportional to 895.54, 1,235.39 and 580.40 is: 800.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.54 : 1,235.39 = 580.40 : x
  2. Step 2: Convert to fraction form
    895.54/1,235.39 = 580.40/x
  3. Step 3: Cross multiply
    895.54x = 1,235.39 × 580.40
  4. Step 4: Simplify right side
    895.54x = 717,020.36
  5. Step 5: Solve for x
    x = 717,020.36/895.54
  6. Step 6: Final answer
    x = 800.66

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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.