Home / 391,501,665.86-540,286,317.11-215,303,288.04

Finding the Fourth Proportional to 391,501,665.86, 540,286,317.11 and 215,303,288.04

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Solution

The fourth proportional to 391,501,665.86, 540,286,317.11 and 215,303,288.04 is: 297,126,246.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,501,665.86 : 540,286,317.11 = 215,303,288.04 : x
  2. Step 2: Convert to fraction form
    391,501,665.86/540,286,317.11 = 215,303,288.04/x
  3. Step 3: Cross multiply
    391,501,665.86x = 540,286,317.11 × 215,303,288.04
  4. Step 4: Simplify right side
    391,501,665.86x = 116,325,420,557,343,360
  5. Step 5: Solve for x
    x = 116,325,420,557,343,360/391,501,665.86
  6. Step 6: Final answer
    x = 297,126,246.71

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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.