Home / 391,866,417-540,775,496.52-215,654,411.88

Finding the Fourth Proportional to 391,866,417, 540,775,496.52 and 215,654,411.88

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Solution

The fourth proportional to 391,866,417, 540,775,496.52 and 215,654,411.88 is: 297,603,000.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,866,417 : 540,775,496.52 = 215,654,411.88 : x
  2. Step 2: Convert to fraction form
    391,866,417/540,775,496.52 = 215,654,411.88/x
  3. Step 3: Cross multiply
    391,866,417x = 540,775,496.52 × 215,654,411.88
  4. Step 4: Simplify right side
    391,866,417x = 116,620,621,661,135,584
  5. Step 5: Solve for x
    x = 116,620,621,661,135,584/391,866,417
  6. Step 6: Final answer
    x = 297,603,000.93

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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.