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Finding the Fourth Proportional to 666,855.84, 919,818 and 475,976.64

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Solution

The fourth proportional to 666,855.84, 919,818 and 475,976.64 is: 656,531.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,855.84 : 919,818 = 475,976.64 : x
  2. Step 2: Convert to fraction form
    666,855.84/919,818 = 475,976.64/x
  3. Step 3: Cross multiply
    666,855.84x = 919,818 × 475,976.64
  4. Step 4: Simplify right side
    666,855.84x = 437,811,881,051.52
  5. Step 5: Solve for x
    x = 437,811,881,051.52/666,855.84
  6. Step 6: Final answer
    x = 656,531.52

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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.