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Finding the Fourth Proportional to 917,673.20, 1,376,509.80 and 386,232.20

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Solution

The fourth proportional to 917,673.20, 1,376,509.80 and 386,232.20 is: 579,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,673.20 : 1,376,509.80 = 386,232.20 : x
  2. Step 2: Convert to fraction form
    917,673.20/1,376,509.80 = 386,232.20/x
  3. Step 3: Cross multiply
    917,673.20x = 1,376,509.80 × 386,232.20
  4. Step 4: Simplify right side
    917,673.20x = 531,652,408,375.56
  5. Step 5: Solve for x
    x = 531,652,408,375.56/917,673.20
  6. Step 6: Final answer
    x = 579,348.30

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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.