Home / 687,743,999.10-1,031,615,998.65-442,855,986.30

Finding the Fourth Proportional to 687,743,999.10, 1,031,615,998.65 and 442,855,986.30

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Solution

The fourth proportional to 687,743,999.10, 1,031,615,998.65 and 442,855,986.30 is: 664,283,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,743,999.10 : 1,031,615,998.65 = 442,855,986.30 : x
  2. Step 2: Convert to fraction form
    687,743,999.10/1,031,615,998.65 = 442,855,986.30/x
  3. Step 3: Cross multiply
    687,743,999.10x = 1,031,615,998.65 × 442,855,986.30
  4. Step 4: Simplify right side
    687,743,999.10x = 456,857,320,565,005,248
  5. Step 5: Solve for x
    x = 456,857,320,565,005,248/687,743,999.10
  6. Step 6: Final answer
    x = 664,283,979.45

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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.