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Finding the Fourth Proportional to 567,612.56, 783,310.68 and 312,972.80

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Solution

The fourth proportional to 567,612.56, 783,310.68 and 312,972.80 is: 431,905.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,612.56 : 783,310.68 = 312,972.80 : x
  2. Step 2: Convert to fraction form
    567,612.56/783,310.68 = 312,972.80/x
  3. Step 3: Cross multiply
    567,612.56x = 783,310.68 × 312,972.80
  4. Step 4: Simplify right side
    567,612.56x = 245,154,936,789.50
  5. Step 5: Solve for x
    x = 245,154,936,789.50/567,612.56
  6. Step 6: Final answer
    x = 431,905.41

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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.