Home / 547,178.48-821,056.64-388,281.20

Finding the Fourth Proportional to 547,178.48, 821,056.64 and 388,281.20

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Solution

The fourth proportional to 547,178.48, 821,056.64 and 388,281.20 is: 582,626.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,178.48 : 821,056.64 = 388,281.20 : x
  2. Step 2: Convert to fraction form
    547,178.48/821,056.64 = 388,281.20/x
  3. Step 3: Cross multiply
    547,178.48x = 821,056.64 × 388,281.20
  4. Step 4: Simplify right side
    547,178.48x = 318,800,857,447.17
  5. Step 5: Solve for x
    x = 318,800,857,447.17/547,178.48
  6. Step 6: Final answer
    x = 582,626.82

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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.