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Finding the Fourth Proportional to 489,181.14, 674,784 and 307,605.60

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Solution

The fourth proportional to 489,181.14, 674,784 and 307,605.60 is: 424,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,181.14 : 674,784 = 307,605.60 : x
  2. Step 2: Convert to fraction form
    489,181.14/674,784 = 307,605.60/x
  3. Step 3: Cross multiply
    489,181.14x = 674,784 × 307,605.60
  4. Step 4: Simplify right side
    489,181.14x = 207,567,337,190.40
  5. Step 5: Solve for x
    x = 207,567,337,190.40/489,181.14
  6. Step 6: Final answer
    x = 424,315.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.