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Finding the Fourth Proportional to 408,979.20, 613,555.20 and 124,646.40

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Solution

The fourth proportional to 408,979.20, 613,555.20 and 124,646.40 is: 186,995.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,979.20 : 613,555.20 = 124,646.40 : x
  2. Step 2: Convert to fraction form
    408,979.20/613,555.20 = 124,646.40/x
  3. Step 3: Cross multiply
    408,979.20x = 613,555.20 × 124,646.40
  4. Step 4: Simplify right side
    408,979.20x = 76,477,446,881.28
  5. Step 5: Solve for x
    x = 76,477,446,881.28/408,979.20
  6. Step 6: Final answer
    x = 186,995.93

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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.