Home / 391,862,479.65-540,770,310.54-215,650,475.03

Finding the Fourth Proportional to 391,862,479.65, 540,770,310.54 and 215,650,475.03

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Solution

The fourth proportional to 391,862,479.65, 540,770,310.54 and 215,650,475.03 is: 297,597,704.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,862,479.65 : 540,770,310.54 = 215,650,475.03 : x
  2. Step 2: Convert to fraction form
    391,862,479.65/540,770,310.54 = 215,650,475.03/x
  3. Step 3: Cross multiply
    391,862,479.65x = 540,770,310.54 × 215,650,475.03
  4. Step 4: Simplify right side
    391,862,479.65x = 116,617,374,350,071,616
  5. Step 5: Solve for x
    x = 116,617,374,350,071,616/391,862,479.65
  6. Step 6: Final answer
    x = 297,597,704.31

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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.