Home / 391,228,056.12-539,906,870.70-215,012,854.20

Finding the Fourth Proportional to 391,228,056.12, 539,906,870.70 and 215,012,854.20

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Solution

The fourth proportional to 391,228,056.12, 539,906,870.70 and 215,012,854.20 is: 296,724,418.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,228,056.12 : 539,906,870.70 = 215,012,854.20 : x
  2. Step 2: Convert to fraction form
    391,228,056.12/539,906,870.70 = 215,012,854.20/x
  3. Step 3: Cross multiply
    391,228,056.12x = 539,906,870.70 × 215,012,854.20
  4. Step 4: Simplify right side
    391,228,056.12x = 116,086,917,271,397,360
  5. Step 5: Solve for x
    x = 116,086,917,271,397,360/391,228,056.12
  6. Step 6: Final answer
    x = 296,724,418.04

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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.