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Finding the Fourth Proportional to 707,938.48, 976,954.68 and 389,986.48

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Solution

The fourth proportional to 707,938.48, 976,954.68 and 389,986.48 is: 538,181.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,938.48 : 976,954.68 = 389,986.48 : x
  2. Step 2: Convert to fraction form
    707,938.48/976,954.68 = 389,986.48/x
  3. Step 3: Cross multiply
    707,938.48x = 976,954.68 × 389,986.48
  4. Step 4: Simplify right side
    707,938.48x = 380,999,116,772.73
  5. Step 5: Solve for x
    x = 380,999,116,772.73/707,938.48
  6. Step 6: Final answer
    x = 538,181.11

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1.5x scale

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.