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Finding the Fourth Proportional to 680,556.87, 939,151.89 and 374,630.51

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Solution

The fourth proportional to 680,556.87, 939,151.89 and 374,630.51 is: 516,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,556.87 : 939,151.89 = 374,630.51 : x
  2. Step 2: Convert to fraction form
    680,556.87/939,151.89 = 374,630.51/x
  3. Step 3: Cross multiply
    680,556.87x = 939,151.89 × 374,630.51
  4. Step 4: Simplify right side
    680,556.87x = 351,834,951,518.16
  5. Step 5: Solve for x
    x = 351,834,951,518.16/680,556.87
  6. Step 6: Final answer
    x = 516,980.97

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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.