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Finding the Fourth Proportional to 408,048.40, 612,130.20 and 127,536.40

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Solution

The fourth proportional to 408,048.40, 612,130.20 and 127,536.40 is: 191,322.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,048.40 : 612,130.20 = 127,536.40 : x
  2. Step 2: Convert to fraction form
    408,048.40/612,130.20 = 127,536.40/x
  3. Step 3: Cross multiply
    408,048.40x = 612,130.20 × 127,536.40
  4. Step 4: Simplify right side
    408,048.40x = 78,068,882,039.28
  5. Step 5: Solve for x
    x = 78,068,882,039.28/408,048.40
  6. Step 6: Final answer
    x = 191,322.60

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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.