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Finding the Fourth Proportional to 393,038.02, 542,362.64 and 220,928.61

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Solution

The fourth proportional to 393,038.02, 542,362.64 and 220,928.61 is: 304,864.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,038.02 : 542,362.64 = 220,928.61 : x
  2. Step 2: Convert to fraction form
    393,038.02/542,362.64 = 220,928.61/x
  3. Step 3: Cross multiply
    393,038.02x = 542,362.64 × 220,928.61
  4. Step 4: Simplify right side
    393,038.02x = 119,823,425,100.35
  5. Step 5: Solve for x
    x = 119,823,425,100.35/393,038.02
  6. Step 6: Final answer
    x = 304,864.72

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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.