Home / 391,743,856.63-540,610,812.90-213,128,760.28

Finding the Fourth Proportional to 391,743,856.63, 540,610,812.90 and 213,128,760.28

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Solution

The fourth proportional to 391,743,856.63, 540,610,812.90 and 213,128,760.28 is: 294,120,023.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,743,856.63 : 540,610,812.90 = 213,128,760.28 : x
  2. Step 2: Convert to fraction form
    391,743,856.63/540,610,812.90 = 213,128,760.28/x
  3. Step 3: Cross multiply
    391,743,856.63x = 540,610,812.90 × 213,128,760.28
  4. Step 4: Simplify right side
    391,743,856.63x = 115,219,712,347,340,032
  5. Step 5: Solve for x
    x = 115,219,712,347,340,032/391,743,856.63
  6. Step 6: Final answer
    x = 294,120,023.57

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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.