Home / 1,087.18-1,630.76-307.18

Finding the Fourth Proportional to 1,087.18, 1,630.76 and 307.18

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Solution

The fourth proportional to 1,087.18, 1,630.76 and 307.18 is: 460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.18 : 1,630.76 = 307.18 : x
  2. Step 2: Convert to fraction form
    1,087.18/1,630.76 = 307.18/x
  3. Step 3: Cross multiply
    1,087.18x = 1,630.76 × 307.18
  4. Step 4: Simplify right side
    1,087.18x = 500,936.86
  5. Step 5: Solve for x
    x = 500,936.86/1,087.18
  6. Step 6: Final answer
    x = 460.77

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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.