Home / 660,690,474.51-911,494,805.36-378,281,985.42

Finding the Fourth Proportional to 660,690,474.51, 911,494,805.36 and 378,281,985.42

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Solution

The fourth proportional to 660,690,474.51, 911,494,805.36 and 378,281,985.42 is: 521,881,392.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,690,474.51 : 911,494,805.36 = 378,281,985.42 : x
  2. Step 2: Convert to fraction form
    660,690,474.51/911,494,805.36 = 378,281,985.42/x
  3. Step 3: Cross multiply
    660,690,474.51x = 911,494,805.36 × 378,281,985.42
  4. Step 4: Simplify right side
    660,690,474.51x = 344,802,064,667,985,472
  5. Step 5: Solve for x
    x = 344,802,064,667,985,472/660,690,474.51
  6. Step 6: Final answer
    x = 521,881,392.23

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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.