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Finding the Fourth Proportional to 667,969.52, 921,699.52 and 406,191.28

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Solution

The fourth proportional to 667,969.52, 921,699.52 and 406,191.28 is: 560,484.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,969.52 : 921,699.52 = 406,191.28 : x
  2. Step 2: Convert to fraction form
    667,969.52/921,699.52 = 406,191.28/x
  3. Step 3: Cross multiply
    667,969.52x = 921,699.52 × 406,191.28
  4. Step 4: Simplify right side
    667,969.52x = 374,386,307,804.19
  5. Step 5: Solve for x
    x = 374,386,307,804.19/667,969.52
  6. Step 6: Final answer
    x = 560,484.12

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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.