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Finding the Fourth Proportional to 325,436.40, 488,154.60 and 138,423.60

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Solution

The fourth proportional to 325,436.40, 488,154.60 and 138,423.60 is: 207,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,436.40 : 488,154.60 = 138,423.60 : x
  2. Step 2: Convert to fraction form
    325,436.40/488,154.60 = 138,423.60/x
  3. Step 3: Cross multiply
    325,436.40x = 488,154.60 × 138,423.60
  4. Step 4: Simplify right side
    325,436.40x = 67,572,117,088.56
  5. Step 5: Solve for x
    x = 67,572,117,088.56/325,436.40
  6. Step 6: Final answer
    x = 207,635.40

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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.