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Finding the Fourth Proportional to 666,051.80, 999,077.70 and 386,115.80

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Solution

The fourth proportional to 666,051.80, 999,077.70 and 386,115.80 is: 579,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,051.80 : 999,077.70 = 386,115.80 : x
  2. Step 2: Convert to fraction form
    666,051.80/999,077.70 = 386,115.80/x
  3. Step 3: Cross multiply
    666,051.80x = 999,077.70 × 386,115.80
  4. Step 4: Simplify right side
    666,051.80x = 385,759,685,397.66
  5. Step 5: Solve for x
    x = 385,759,685,397.66/666,051.80
  6. Step 6: Final answer
    x = 579,173.70

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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.