Home / 660,690,475.51-911,494,806.74-378,281,986.42

Finding the Fourth Proportional to 660,690,475.51, 911,494,806.74 and 378,281,986.42

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Solution

The fourth proportional to 660,690,475.51, 911,494,806.74 and 378,281,986.42 is: 521,881,393.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,690,475.51 : 911,494,806.74 = 378,281,986.42 : x
  2. Step 2: Convert to fraction form
    660,690,475.51/911,494,806.74 = 378,281,986.42/x
  3. Step 3: Cross multiply
    660,690,475.51x = 911,494,806.74 × 378,281,986.42
  4. Step 4: Simplify right side
    660,690,475.51x = 344,802,066,105,121,216
  5. Step 5: Solve for x
    x = 344,802,066,105,121,216/660,690,475.51
  6. Step 6: Final answer
    x = 521,881,393.61

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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.