Home / 687,297,287.67-948,670,120.89-449,178,292.80

Finding the Fourth Proportional to 687,297,287.67, 948,670,120.89 and 449,178,292.80

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Solution

The fourth proportional to 687,297,287.67, 948,670,120.89 and 449,178,292.80 is: 619,996,663.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,297,287.67 : 948,670,120.89 = 449,178,292.80 : x
  2. Step 2: Convert to fraction form
    687,297,287.67/948,670,120.89 = 449,178,292.80/x
  3. Step 3: Cross multiply
    687,297,287.67x = 948,670,120.89 × 449,178,292.80
  4. Step 4: Simplify right side
    687,297,287.67x = 426,122,025,331,739,840
  5. Step 5: Solve for x
    x = 426,122,025,331,739,840/687,297,287.67
  6. Step 6: Final answer
    x = 619,996,663.71

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1.5x scale

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.