Home / 1,263.20-1,895.08-385.74

Finding the Fourth Proportional to 1,263.20, 1,895.08 and 385.74

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Solution

The fourth proportional to 1,263.20, 1,895.08 and 385.74 is: 578.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.20 : 1,895.08 = 385.74 : x
  2. Step 2: Convert to fraction form
    1,263.20/1,895.08 = 385.74/x
  3. Step 3: Cross multiply
    1,263.20x = 1,895.08 × 385.74
  4. Step 4: Simplify right side
    1,263.20x = 731,008.16
  5. Step 5: Solve for x
    x = 731,008.16/1,263.20
  6. Step 6: Final answer
    x = 578.70

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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.