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Finding the Fourth Proportional to 319,387.32, 440,771.34 and 223,859.16

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Solution

The fourth proportional to 319,387.32, 440,771.34 and 223,859.16 is: 308,937.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,387.32 : 440,771.34 = 223,859.16 : x
  2. Step 2: Convert to fraction form
    319,387.32/440,771.34 = 223,859.16/x
  3. Step 3: Cross multiply
    319,387.32x = 440,771.34 × 223,859.16
  4. Step 4: Simplify right side
    319,387.32x = 98,670,701,924.47
  5. Step 5: Solve for x
    x = 98,670,701,924.47/319,387.32
  6. Step 6: Final answer
    x = 308,937.44

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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.