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Finding the Fourth Proportional to 401,569.80, 601,188.30 and 389,905.80

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Solution

The fourth proportional to 401,569.80, 601,188.30 and 389,905.80 is: 583,726.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,569.80 : 601,188.30 = 389,905.80 : x
  2. Step 2: Convert to fraction form
    401,569.80/601,188.30 = 389,905.80/x
  3. Step 3: Cross multiply
    401,569.80x = 601,188.30 × 389,905.80
  4. Step 4: Simplify right side
    401,569.80x = 234,406,805,062.14
  5. Step 5: Solve for x
    x = 234,406,805,062.14/401,569.80
  6. Step 6: Final answer
    x = 583,726.18

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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.