Home / 521,881,669.78-720,154,108.97-307,266,439.03

Finding the Fourth Proportional to 521,881,669.78, 720,154,108.97 and 307,266,439.03

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Solution

The fourth proportional to 521,881,669.78, 720,154,108.97 and 307,266,439.03 is: 424,002,607.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,881,669.78 : 720,154,108.97 = 307,266,439.03 : x
  2. Step 2: Convert to fraction form
    521,881,669.78/720,154,108.97 = 307,266,439.03/x
  3. Step 3: Cross multiply
    521,881,669.78x = 720,154,108.97 × 307,266,439.03
  4. Step 4: Simplify right side
    521,881,669.78x = 221,279,188,613,849,984
  5. Step 5: Solve for x
    x = 221,279,188,613,849,984/521,881,669.78
  6. Step 6: Final answer
    x = 424,002,607.16

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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.