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Finding the Fourth Proportional to 558,420.57, 768,674.88 and 486,677.25

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Solution

The fourth proportional to 558,420.57, 768,674.88 and 486,677.25 is: 669,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,420.57 : 768,674.88 = 486,677.25 : x
  2. Step 2: Convert to fraction form
    558,420.57/768,674.88 = 486,677.25/x
  3. Step 3: Cross multiply
    558,420.57x = 768,674.88 × 486,677.25
  4. Step 4: Simplify right side
    558,420.57x = 374,096,576,742.48
  5. Step 5: Solve for x
    x = 374,096,576,742.48/558,420.57
  6. Step 6: Final answer
    x = 669,919.05

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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.