Home / 390,054,680.70-538,275,329.49-213,838,892.55

Finding the Fourth Proportional to 390,054,680.70, 538,275,329.49 and 213,838,892.55

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Solution

The fourth proportional to 390,054,680.70, 538,275,329.49 and 213,838,892.55 is: 295,097,600.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,054,680.70 : 538,275,329.49 = 213,838,892.55 : x
  2. Step 2: Convert to fraction form
    390,054,680.70/538,275,329.49 = 213,838,892.55/x
  3. Step 3: Cross multiply
    390,054,680.70x = 538,275,329.49 × 213,838,892.55
  4. Step 4: Simplify right side
    390,054,680.70x = 115,104,200,345,127,968
  5. Step 5: Solve for x
    x = 115,104,200,345,127,968/390,054,680.70
  6. Step 6: Final answer
    x = 295,097,600.52

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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.