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Finding the Fourth Proportional to 493,805.19, 681,200.76 and 312,211.29

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Solution

The fourth proportional to 493,805.19, 681,200.76 and 312,211.29 is: 430,693.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,805.19 : 681,200.76 = 312,211.29 : x
  2. Step 2: Convert to fraction form
    493,805.19/681,200.76 = 312,211.29/x
  3. Step 3: Cross multiply
    493,805.19x = 681,200.76 × 312,211.29
  4. Step 4: Simplify right side
    493,805.19x = 212,678,568,028.58
  5. Step 5: Solve for x
    x = 212,678,568,028.58/493,805.19
  6. Step 6: Final answer
    x = 430,693.26

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1.5x scale

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.