Home / 659,966,556.90-990,705,662.55-387,490,851.30

Finding the Fourth Proportional to 659,966,556.90, 990,705,662.55 and 387,490,851.30

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Solution

The fourth proportional to 659,966,556.90, 990,705,662.55 and 387,490,851.30 is: 581,680,051.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,966,556.90 : 990,705,662.55 = 387,490,851.30 : x
  2. Step 2: Convert to fraction form
    659,966,556.90/990,705,662.55 = 387,490,851.30/x
  3. Step 3: Cross multiply
    659,966,556.90x = 990,705,662.55 × 387,490,851.30
  4. Step 4: Simplify right side
    659,966,556.90x = 383,889,380,569,230,016
  5. Step 5: Solve for x
    x = 383,889,380,569,230,016/659,966,556.90
  6. Step 6: Final answer
    x = 581,680,051.14

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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.