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Finding the Fourth Proportional to 338,807.20, 508,412.40 and 128,466.40

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Solution

The fourth proportional to 338,807.20, 508,412.40 and 128,466.40 is: 192,776.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,807.20 : 508,412.40 = 128,466.40 : x
  2. Step 2: Convert to fraction form
    338,807.20/508,412.40 = 128,466.40/x
  3. Step 3: Cross multiply
    338,807.20x = 508,412.40 × 128,466.40
  4. Step 4: Simplify right side
    338,807.20x = 65,313,910,743.36
  5. Step 5: Solve for x
    x = 65,313,910,743.36/338,807.20
  6. Step 6: Final answer
    x = 192,776.04

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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.