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Finding the Fourth Proportional to 290,656.80, 435,985.20 and 274,327.20

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Solution

The fourth proportional to 290,656.80, 435,985.20 and 274,327.20 is: 411,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,656.80 : 435,985.20 = 274,327.20 : x
  2. Step 2: Convert to fraction form
    290,656.80/435,985.20 = 274,327.20/x
  3. Step 3: Cross multiply
    290,656.80x = 435,985.20 × 274,327.20
  4. Step 4: Simplify right side
    290,656.80x = 119,602,599,157.44
  5. Step 5: Solve for x
    x = 119,602,599,157.44/290,656.80
  6. Step 6: Final answer
    x = 411,490.80

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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.