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Finding the Fourth Proportional to 325,625.70, 487,790.55 and 286,659.30

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Solution

The fourth proportional to 325,625.70, 487,790.55 and 286,659.30 is: 429,418.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,625.70 : 487,790.55 = 286,659.30 : x
  2. Step 2: Convert to fraction form
    325,625.70/487,790.55 = 286,659.30/x
  3. Step 3: Cross multiply
    325,625.70x = 487,790.55 × 286,659.30
  4. Step 4: Simplify right side
    325,625.70x = 139,829,697,609.62
  5. Step 5: Solve for x
    x = 139,829,697,609.62/325,625.70
  6. Step 6: Final answer
    x = 429,418.49

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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.