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Finding the Fourth Proportional to 611,988,240.48, 918,252,805.14 and 320,785,735.02

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Solution

The fourth proportional to 611,988,240.48, 918,252,805.14 and 320,785,735.02 is: 481,320,361.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,988,240.48 : 918,252,805.14 = 320,785,735.02 : x
  2. Step 2: Convert to fraction form
    611,988,240.48/918,252,805.14 = 320,785,735.02/x
  3. Step 3: Cross multiply
    611,988,240.48x = 918,252,805.14 × 320,785,735.02
  4. Step 4: Simplify right side
    611,988,240.48x = 294,562,401,031,011,712
  5. Step 5: Solve for x
    x = 294,562,401,031,011,712/611,988,240.48
  6. Step 6: Final answer
    x = 481,320,361.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.