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Finding the Fourth Proportional to 451,644.80, 621,705.44 and 390,363.03

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Solution

The fourth proportional to 451,644.80, 621,705.44 and 390,363.03 is: 537,348.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,644.80 : 621,705.44 = 390,363.03 : x
  2. Step 2: Convert to fraction form
    451,644.80/621,705.44 = 390,363.03/x
  3. Step 3: Cross multiply
    451,644.80x = 621,705.44 × 390,363.03
  4. Step 4: Simplify right side
    451,644.80x = 242,690,820,301.79
  5. Step 5: Solve for x
    x = 242,690,820,301.79/451,644.80
  6. Step 6: Final answer
    x = 537,348.87

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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.