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Finding the Fourth Proportional to 290,658.80, 435,988.20 and 274,329.20

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Solution

The fourth proportional to 290,658.80, 435,988.20 and 274,329.20 is: 411,493.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,658.80 : 435,988.20 = 274,329.20 : x
  2. Step 2: Convert to fraction form
    290,658.80/435,988.20 = 274,329.20/x
  3. Step 3: Cross multiply
    290,658.80x = 435,988.20 × 274,329.20
  4. Step 4: Simplify right side
    290,658.80x = 119,604,294,115.44
  5. Step 5: Solve for x
    x = 119,604,294,115.44/290,658.80
  6. Step 6: Final answer
    x = 411,493.80

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1.5x scale

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.