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Finding the Fourth Proportional to 325,358.55, 485,823.06 and 287,088.88

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Solution

The fourth proportional to 325,358.55, 485,823.06 and 287,088.88 is: 428,679.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,358.55 : 485,823.06 = 287,088.88 : x
  2. Step 2: Convert to fraction form
    325,358.55/485,823.06 = 287,088.88/x
  3. Step 3: Cross multiply
    325,358.55x = 485,823.06 × 287,088.88
  4. Step 4: Simplify right side
    325,358.55x = 139,474,398,173.57
  5. Step 5: Solve for x
    x = 139,474,398,173.57/325,358.55
  6. Step 6: Final answer
    x = 428,679.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.