Home / 391,501,667.36-540,286,319.19-215,303,289.54

Finding the Fourth Proportional to 391,501,667.36, 540,286,319.19 and 215,303,289.54

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Solution

The fourth proportional to 391,501,667.36, 540,286,319.19 and 215,303,289.54 is: 297,126,248.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,501,667.36 : 540,286,319.19 = 215,303,289.54 : x
  2. Step 2: Convert to fraction form
    391,501,667.36/540,286,319.19 = 215,303,289.54/x
  3. Step 3: Cross multiply
    391,501,667.36x = 540,286,319.19 × 215,303,289.54
  4. Step 4: Simplify right side
    391,501,667.36x = 116,325,421,815,065,440
  5. Step 5: Solve for x
    x = 116,325,421,815,065,440/391,501,667.36
  6. Step 6: Final answer
    x = 297,126,248.79

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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.