Home / 391,488,831.84-540,289,015.92-215,307,870.24

Finding the Fourth Proportional to 391,488,831.84, 540,289,015.92 and 215,307,870.24

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Solution

The fourth proportional to 391,488,831.84, 540,289,015.92 and 215,307,870.24 is: 297,143,795.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,488,831.84 : 540,289,015.92 = 215,307,870.24 : x
  2. Step 2: Convert to fraction form
    391,488,831.84/540,289,015.92 = 215,307,870.24/x
  3. Step 3: Cross multiply
    391,488,831.84x = 540,289,015.92 × 215,307,870.24
  4. Step 4: Simplify right side
    391,488,831.84x = 116,328,477,331,800,656
  5. Step 5: Solve for x
    x = 116,328,477,331,800,656/391,488,831.84
  6. Step 6: Final answer
    x = 297,143,795.35

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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.