Home / 639,438,638.16-882,446,717.88-391,872,182.16

Finding the Fourth Proportional to 639,438,638.16, 882,446,717.88 and 391,872,182.16

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Solution

The fourth proportional to 639,438,638.16, 882,446,717.88 and 391,872,182.16 is: 540,796,724.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,438,638.16 : 882,446,717.88 = 391,872,182.16 : x
  2. Step 2: Convert to fraction form
    639,438,638.16/882,446,717.88 = 391,872,182.16/x
  3. Step 3: Cross multiply
    639,438,638.16x = 882,446,717.88 × 391,872,182.16
  4. Step 4: Simplify right side
    639,438,638.16x = 345,806,320,975,565,504
  5. Step 5: Solve for x
    x = 345,806,320,975,565,504/639,438,638.16
  6. Step 6: Final answer
    x = 540,796,724.41

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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.