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Finding the Fourth Proportional to 414,007.60, 621,011.40 and 339,212.20

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Solution

The fourth proportional to 414,007.60, 621,011.40 and 339,212.20 is: 508,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,007.60 : 621,011.40 = 339,212.20 : x
  2. Step 2: Convert to fraction form
    414,007.60/621,011.40 = 339,212.20/x
  3. Step 3: Cross multiply
    414,007.60x = 621,011.40 × 339,212.20
  4. Step 4: Simplify right side
    414,007.60x = 210,654,643,219.08
  5. Step 5: Solve for x
    x = 210,654,643,219.08/414,007.60
  6. Step 6: Final answer
    x = 508,818.30

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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.