Home / 388,324,887.15-535,884,722.60-212,112,815.07

Finding the Fourth Proportional to 388,324,887.15, 535,884,722.60 and 212,112,815.07

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Solution

The fourth proportional to 388,324,887.15, 535,884,722.60 and 212,112,815.07 is: 292,713,706.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,324,887.15 : 535,884,722.60 = 212,112,815.07 : x
  2. Step 2: Convert to fraction form
    388,324,887.15/535,884,722.60 = 212,112,815.07/x
  3. Step 3: Cross multiply
    388,324,887.15x = 535,884,722.60 × 212,112,815.07
  4. Step 4: Simplify right side
    388,324,887.15x = 113,668,017,062,631,488
  5. Step 5: Solve for x
    x = 113,668,017,062,631,488/388,324,887.15
  6. Step 6: Final answer
    x = 292,713,706.55

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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.