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Finding the Fourth Proportional to 1,263.98, 1,895.66 and 398.30

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Solution

The fourth proportional to 1,263.98, 1,895.66 and 398.30 is: 597.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.98 : 1,895.66 = 398.30 : x
  2. Step 2: Convert to fraction form
    1,263.98/1,895.66 = 398.30/x
  3. Step 3: Cross multiply
    1,263.98x = 1,895.66 × 398.30
  4. Step 4: Simplify right side
    1,263.98x = 755,041.38
  5. Step 5: Solve for x
    x = 755,041.38/1,263.98
  6. Step 6: Final answer
    x = 597.35

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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.