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Finding the Fourth Proportional to 573,193.80, 789,640.32 and 400,789.18

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Solution

The fourth proportional to 573,193.80, 789,640.32 and 400,789.18 is: 552,133.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,193.80 : 789,640.32 = 400,789.18 : x
  2. Step 2: Convert to fraction form
    573,193.80/789,640.32 = 400,789.18/x
  3. Step 3: Cross multiply
    573,193.80x = 789,640.32 × 400,789.18
  4. Step 4: Simplify right side
    573,193.80x = 316,479,296,347.74
  5. Step 5: Solve for x
    x = 316,479,296,347.74/573,193.80
  6. Step 6: Final answer
    x = 552,133.15

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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.