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Finding the Fourth Proportional to 290,256.08, 435,372.78 and 79,888.28

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Solution

The fourth proportional to 290,256.08, 435,372.78 and 79,888.28 is: 119,829.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,256.08 : 435,372.78 = 79,888.28 : x
  2. Step 2: Convert to fraction form
    290,256.08/435,372.78 = 79,888.28/x
  3. Step 3: Cross multiply
    290,256.08x = 435,372.78 × 79,888.28
  4. Step 4: Simplify right side
    290,256.08x = 34,781,182,553.02
  5. Step 5: Solve for x
    x = 34,781,182,553.02/290,256.08
  6. Step 6: Final answer
    x = 119,829.30

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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.