Home / 391,722,475.59-540,576,991.62-215,506,690.61

Finding the Fourth Proportional to 391,722,475.59, 540,576,991.62 and 215,506,690.61

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Solution

The fourth proportional to 391,722,475.59, 540,576,991.62 and 215,506,690.61 is: 297,399,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,722,475.59 : 540,576,991.62 = 215,506,690.61 : x
  2. Step 2: Convert to fraction form
    391,722,475.59/540,576,991.62 = 215,506,690.61/x
  3. Step 3: Cross multiply
    391,722,475.59x = 540,576,991.62 × 215,506,690.61
  4. Step 4: Simplify right side
    391,722,475.59x = 116,497,958,481,233,008
  5. Step 5: Solve for x
    x = 116,497,958,481,233,008/391,722,475.59
  6. Step 6: Final answer
    x = 297,399,219.45

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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.