Home / 378,317,643.62-522,078,572.09-211,053,905.40

Finding the Fourth Proportional to 378,317,643.62, 522,078,572.09 and 211,053,905.40

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Solution

The fourth proportional to 378,317,643.62, 522,078,572.09 and 211,053,905.40 is: 291,254,514.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,317,643.62 : 522,078,572.09 = 211,053,905.40 : x
  2. Step 2: Convert to fraction form
    378,317,643.62/522,078,572.09 = 211,053,905.40/x
  3. Step 3: Cross multiply
    378,317,643.62x = 522,078,572.09 × 211,053,905.40
  4. Step 4: Simplify right side
    378,317,643.62x = 110,186,721,564,194,672
  5. Step 5: Solve for x
    x = 110,186,721,564,194,672/378,317,643.62
  6. Step 6: Final answer
    x = 291,254,514.36

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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.