Home / 643,573,507.60-965,360,261.40-212,752,003.60

Finding the Fourth Proportional to 643,573,507.60, 965,360,261.40 and 212,752,003.60

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Solution

The fourth proportional to 643,573,507.60, 965,360,261.40 and 212,752,003.60 is: 319,128,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,573,507.60 : 965,360,261.40 = 212,752,003.60 : x
  2. Step 2: Convert to fraction form
    643,573,507.60/965,360,261.40 = 212,752,003.60/x
  3. Step 3: Cross multiply
    643,573,507.60x = 965,360,261.40 × 212,752,003.60
  4. Step 4: Simplify right side
    643,573,507.60x = 205,382,329,808,669,728
  5. Step 5: Solve for x
    x = 205,382,329,808,669,728/643,573,507.60
  6. Step 6: Final answer
    x = 319,128,005.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.