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Finding the Fourth Proportional to 393,444.58, 542,953.55 and 223,678.71

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Solution

The fourth proportional to 393,444.58, 542,953.55 and 223,678.71 is: 308,676.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,444.58 : 542,953.55 = 223,678.71 : x
  2. Step 2: Convert to fraction form
    393,444.58/542,953.55 = 223,678.71/x
  3. Step 3: Cross multiply
    393,444.58x = 542,953.55 × 223,678.71
  4. Step 4: Simplify right side
    393,444.58x = 121,447,149,653.92
  5. Step 5: Solve for x
    x = 121,447,149,653.92/393,444.58
  6. Step 6: Final answer
    x = 308,676.64

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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.