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Finding the Fourth Proportional to 666,696.51, 920,056.93 and 380,210.44

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Solution

The fourth proportional to 666,696.51, 920,056.93 and 380,210.44 is: 524,699.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,696.51 : 920,056.93 = 380,210.44 : x
  2. Step 2: Convert to fraction form
    666,696.51/920,056.93 = 380,210.44/x
  3. Step 3: Cross multiply
    666,696.51x = 920,056.93 × 380,210.44
  4. Step 4: Simplify right side
    666,696.51x = 349,815,250,180.35
  5. Step 5: Solve for x
    x = 349,815,250,180.35/666,696.51
  6. Step 6: Final answer
    x = 524,699.39

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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.