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Finding the Fourth Proportional to 666,484, 919,747.92 and 364,678

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Solution

The fourth proportional to 666,484, 919,747.92 and 364,678 is: 503,255.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,484 : 919,747.92 = 364,678 : x
  2. Step 2: Convert to fraction form
    666,484/919,747.92 = 364,678/x
  3. Step 3: Cross multiply
    666,484x = 919,747.92 × 364,678
  4. Step 4: Simplify right side
    666,484x = 335,411,831,969.76
  5. Step 5: Solve for x
    x = 335,411,831,969.76/666,484
  6. Step 6: Final answer
    x = 503,255.64

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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.