Home / 390,482,970.72-538,865,020.82-214,273,914.28

Finding the Fourth Proportional to 390,482,970.72, 538,865,020.82 and 214,273,914.28

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Solution

The fourth proportional to 390,482,970.72, 538,865,020.82 and 214,273,914.28 is: 295,697,190.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,482,970.72 : 538,865,020.82 = 214,273,914.28 : x
  2. Step 2: Convert to fraction form
    390,482,970.72/538,865,020.82 = 214,273,914.28/x
  3. Step 3: Cross multiply
    390,482,970.72x = 538,865,020.82 × 214,273,914.28
  4. Step 4: Simplify right side
    390,482,970.72x = 115,464,717,279,675,104
  5. Step 5: Solve for x
    x = 115,464,717,279,675,104/390,482,970.72
  6. Step 6: Final answer
    x = 295,697,190.24

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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.