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Finding the Fourth Proportional to 385,418.40, 578,098.80 and 160,720.80

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Solution

The fourth proportional to 385,418.40, 578,098.80 and 160,720.80 is: 241,069.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,418.40 : 578,098.80 = 160,720.80 : x
  2. Step 2: Convert to fraction form
    385,418.40/578,098.80 = 160,720.80/x
  3. Step 3: Cross multiply
    385,418.40x = 578,098.80 × 160,720.80
  4. Step 4: Simplify right side
    385,418.40x = 92,912,501,615.04
  5. Step 5: Solve for x
    x = 92,912,501,615.04/385,418.40
  6. Step 6: Final answer
    x = 241,069.19

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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.