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Finding the Fourth Proportional to 308,987.36, 426,065.34 and 268,342.40

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Solution

The fourth proportional to 308,987.36, 426,065.34 and 268,342.40 is: 370,019.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,987.36 : 426,065.34 = 268,342.40 : x
  2. Step 2: Convert to fraction form
    308,987.36/426,065.34 = 268,342.40/x
  3. Step 3: Cross multiply
    308,987.36x = 426,065.34 × 268,342.40
  4. Step 4: Simplify right side
    308,987.36x = 114,331,395,892.42
  5. Step 5: Solve for x
    x = 114,331,395,892.42/308,987.36
  6. Step 6: Final answer
    x = 370,019.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.