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Finding the Fourth Proportional to 407,319.40, 610,979.10 and 265,604.20

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Solution

The fourth proportional to 407,319.40, 610,979.10 and 265,604.20 is: 398,406.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,319.40 : 610,979.10 = 265,604.20 : x
  2. Step 2: Convert to fraction form
    407,319.40/610,979.10 = 265,604.20/x
  3. Step 3: Cross multiply
    407,319.40x = 610,979.10 × 265,604.20
  4. Step 4: Simplify right side
    407,319.40x = 162,278,615,072.22
  5. Step 5: Solve for x
    x = 162,278,615,072.22/407,319.40
  6. Step 6: Final answer
    x = 398,406.30

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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.