Home / 638,720,685.68-881,397,766.22-356,440,988.34

Finding the Fourth Proportional to 638,720,685.68, 881,397,766.22 and 356,440,988.34

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Solution

The fourth proportional to 638,720,685.68, 881,397,766.22 and 356,440,988.34 is: 491,868,038.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,720,685.68 : 881,397,766.22 = 356,440,988.34 : x
  2. Step 2: Convert to fraction form
    638,720,685.68/881,397,766.22 = 356,440,988.34/x
  3. Step 3: Cross multiply
    638,720,685.68x = 881,397,766.22 × 356,440,988.34
  4. Step 4: Simplify right side
    638,720,685.68x = 314,166,290,910,342,848
  5. Step 5: Solve for x
    x = 314,166,290,910,342,848/638,720,685.68
  6. Step 6: Final answer
    x = 491,868,038.65

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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.