Home / 639,013,900,643.72-881,866,902,850.98-353,872,420,739.72

Finding the Fourth Proportional to 639,013,900,643.72, 881,866,902,850.98 and 353,872,420,739.72

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Solution

The fourth proportional to 639,013,900,643.72, 881,866,902,850.98 and 353,872,420,739.72 is: 488,359,291,351.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,013,900,643.72 : 881,866,902,850.98 = 353,872,420,739.72 : x
  2. Step 2: Convert to fraction form
    639,013,900,643.72/881,866,902,850.98 = 353,872,420,739.72/x
  3. Step 3: Cross multiply
    639,013,900,643.72x = 881,866,902,850.98 × 353,872,420,739.72
  4. Step 4: Simplify right side
    639,013,900,643.72x = 312,068,375,682,115,761,602,560
  5. Step 5: Solve for x
    x = 312,068,375,682,115,761,602,560/639,013,900,643.72
  6. Step 6: Final answer
    x = 488,359,291,351.49

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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.