Home / 639,759,360.80-959,639,041.20-542,904,238.55

Finding the Fourth Proportional to 639,759,360.80, 959,639,041.20 and 542,904,238.55

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Solution

The fourth proportional to 639,759,360.80, 959,639,041.20 and 542,904,238.55 is: 814,356,357.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,759,360.80 : 959,639,041.20 = 542,904,238.55 : x
  2. Step 2: Convert to fraction form
    639,759,360.80/959,639,041.20 = 542,904,238.55/x
  3. Step 3: Cross multiply
    639,759,360.80x = 959,639,041.20 × 542,904,238.55
  4. Step 4: Simplify right side
    639,759,360.80x = 520,992,102,945,538,048
  5. Step 5: Solve for x
    x = 520,992,102,945,538,048/639,759,360.80
  6. Step 6: Final answer
    x = 814,356,357.83

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Double scale
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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.