Home / 388,633,888.54-536,313,988.65-221,370,086.43

Finding the Fourth Proportional to 388,633,888.54, 536,313,988.65 and 221,370,086.43

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Solution

The fourth proportional to 388,633,888.54, 536,313,988.65 and 221,370,086.43 is: 305,490,276.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,633,888.54 : 536,313,988.65 = 221,370,086.43 : x
  2. Step 2: Convert to fraction form
    388,633,888.54/536,313,988.65 = 221,370,086.43/x
  3. Step 3: Cross multiply
    388,633,888.54x = 536,313,988.65 × 221,370,086.43
  4. Step 4: Simplify right side
    388,633,888.54x = 118,723,874,021,898,688
  5. Step 5: Solve for x
    x = 118,723,874,021,898,688/388,633,888.54
  6. Step 6: Final answer
    x = 305,490,276.38

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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.