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Finding the Fourth Proportional to 557,360.80, 836,041.20 and 389,399.20

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Solution

The fourth proportional to 557,360.80, 836,041.20 and 389,399.20 is: 584,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,360.80 : 836,041.20 = 389,399.20 : x
  2. Step 2: Convert to fraction form
    557,360.80/836,041.20 = 389,399.20/x
  3. Step 3: Cross multiply
    557,360.80x = 836,041.20 × 389,399.20
  4. Step 4: Simplify right side
    557,360.80x = 325,553,774,447.04
  5. Step 5: Solve for x
    x = 325,553,774,447.04/557,360.80
  6. Step 6: Final answer
    x = 584,098.80

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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.