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Finding the Fourth Proportional to 319,283.28, 439,800.84 and 243,700.56

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Solution

The fourth proportional to 319,283.28, 439,800.84 and 243,700.56 is: 335,688.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,283.28 : 439,800.84 = 243,700.56 : x
  2. Step 2: Convert to fraction form
    319,283.28/439,800.84 = 243,700.56/x
  3. Step 3: Cross multiply
    319,283.28x = 439,800.84 × 243,700.56
  4. Step 4: Simplify right side
    319,283.28x = 107,179,710,996.47
  5. Step 5: Solve for x
    x = 107,179,710,996.47/319,283.28
  6. Step 6: Final answer
    x = 335,688.46

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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.