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Finding the Fourth Proportional to 319,908.72, 441,271.28 and 243,259.78

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Solution

The fourth proportional to 319,908.72, 441,271.28 and 243,259.78 is: 335,544.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,908.72 : 441,271.28 = 243,259.78 : x
  2. Step 2: Convert to fraction form
    319,908.72/441,271.28 = 243,259.78/x
  3. Step 3: Cross multiply
    319,908.72x = 441,271.28 × 243,259.78
  4. Step 4: Simplify right side
    319,908.72x = 107,343,554,493.12
  5. Step 5: Solve for x
    x = 107,343,554,493.12/319,908.72
  6. Step 6: Final answer
    x = 335,544.32

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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.