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Finding the Fourth Proportional to 666,008.04, 918,971.62 and 393,940.52

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Solution

The fourth proportional to 666,008.04, 918,971.62 and 393,940.52 is: 543,567.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,008.04 : 918,971.62 = 393,940.52 : x
  2. Step 2: Convert to fraction form
    666,008.04/918,971.62 = 393,940.52/x
  3. Step 3: Cross multiply
    666,008.04x = 918,971.62 × 393,940.52
  4. Step 4: Simplify right side
    666,008.04x = 362,020,157,848.04
  5. Step 5: Solve for x
    x = 362,020,157,848.04/666,008.04
  6. Step 6: Final answer
    x = 543,567.25

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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.