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Finding the Fourth Proportional to 667,612.80, 920,996.48 and 591,209.60

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Solution

The fourth proportional to 667,612.80, 920,996.48 and 591,209.60 is: 815,595.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,612.80 : 920,996.48 = 591,209.60 : x
  2. Step 2: Convert to fraction form
    667,612.80/920,996.48 = 591,209.60/x
  3. Step 3: Cross multiply
    667,612.80x = 920,996.48 × 591,209.60
  4. Step 4: Simplify right side
    667,612.80x = 544,501,960,542.21
  5. Step 5: Solve for x
    x = 544,501,960,542.21/667,612.80
  6. Step 6: Final answer
    x = 815,595.45

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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.