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Finding the Fourth Proportional to 390,016.80, 585,025.20 and 341,805.60

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Solution

The fourth proportional to 390,016.80, 585,025.20 and 341,805.60 is: 512,708.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,016.80 : 585,025.20 = 341,805.60 : x
  2. Step 2: Convert to fraction form
    390,016.80/585,025.20 = 341,805.60/x
  3. Step 3: Cross multiply
    390,016.80x = 585,025.20 × 341,805.60
  4. Step 4: Simplify right side
    390,016.80x = 199,964,889,501.12
  5. Step 5: Solve for x
    x = 199,964,889,501.12/390,016.80
  6. Step 6: Final answer
    x = 512,708.40

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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.