Home / 391,940,762.32-540,602,878.92-257,935,983.54

Finding the Fourth Proportional to 391,940,762.32, 540,602,878.92 and 257,935,983.54

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Solution

The fourth proportional to 391,940,762.32, 540,602,878.92 and 257,935,983.54 is: 355,770,434.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,940,762.32 : 540,602,878.92 = 257,935,983.54 : x
  2. Step 2: Convert to fraction form
    391,940,762.32/540,602,878.92 = 257,935,983.54/x
  3. Step 3: Cross multiply
    391,940,762.32x = 540,602,878.92 × 257,935,983.54
  4. Step 4: Simplify right side
    391,940,762.32x = 139,440,935,278,785,712
  5. Step 5: Solve for x
    x = 139,440,935,278,785,712/391,940,762.32
  6. Step 6: Final answer
    x = 355,770,434.42

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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.