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Finding the Fourth Proportional to 438,864.80, 658,297.20 and 415,536.80

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Solution

The fourth proportional to 438,864.80, 658,297.20 and 415,536.80 is: 623,305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,864.80 : 658,297.20 = 415,536.80 : x
  2. Step 2: Convert to fraction form
    438,864.80/658,297.20 = 415,536.80/x
  3. Step 3: Cross multiply
    438,864.80x = 658,297.20 × 415,536.80
  4. Step 4: Simplify right side
    438,864.80x = 273,546,711,936.96
  5. Step 5: Solve for x
    x = 273,546,711,936.96/438,864.80
  6. Step 6: Final answer
    x = 623,305.20

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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.