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Finding the Fourth Proportional to 1,086.63, 1,630.11 and 470.39

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Solution

The fourth proportional to 1,086.63, 1,630.11 and 470.39 is: 705.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.63 : 1,630.11 = 470.39 : x
  2. Step 2: Convert to fraction form
    1,086.63/1,630.11 = 470.39/x
  3. Step 3: Cross multiply
    1,086.63x = 1,630.11 × 470.39
  4. Step 4: Simplify right side
    1,086.63x = 766,779.29
  5. Step 5: Solve for x
    x = 766,779.29/1,086.63
  6. Step 6: Final answer
    x = 705.65

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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.