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Finding the Fourth Proportional to 393,305.94, 542,808.81 and 223,565.58

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Solution

The fourth proportional to 393,305.94, 542,808.81 and 223,565.58 is: 308,547.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,305.94 : 542,808.81 = 223,565.58 : x
  2. Step 2: Convert to fraction form
    393,305.94/542,808.81 = 223,565.58/x
  3. Step 3: Cross multiply
    393,305.94x = 542,808.81 × 223,565.58
  4. Step 4: Simplify right side
    393,305.94x = 121,353,366,436.76
  5. Step 5: Solve for x
    x = 121,353,366,436.76/393,305.94
  6. Step 6: Final answer
    x = 308,547.00

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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.