Home / 390,533,651.78-538,900,820.65-231,736,412.84

Finding the Fourth Proportional to 390,533,651.78, 538,900,820.65 and 231,736,412.84

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Solution

The fourth proportional to 390,533,651.78, 538,900,820.65 and 231,736,412.84 is: 319,775,114.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,533,651.78 : 538,900,820.65 = 231,736,412.84 : x
  2. Step 2: Convert to fraction form
    390,533,651.78/538,900,820.65 = 231,736,412.84/x
  3. Step 3: Cross multiply
    390,533,651.78x = 538,900,820.65 × 231,736,412.84
  4. Step 4: Simplify right side
    390,533,651.78x = 124,882,943,053,963,200
  5. Step 5: Solve for x
    x = 124,882,943,053,963,200/390,533,651.78
  6. Step 6: Final answer
    x = 319,775,114.09

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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.