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Finding the Fourth Proportional to 551,020.20, 760,484.64 and 306,060

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Solution

The fourth proportional to 551,020.20, 760,484.64 and 306,060 is: 422,405.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,020.20 : 760,484.64 = 306,060 : x
  2. Step 2: Convert to fraction form
    551,020.20/760,484.64 = 306,060/x
  3. Step 3: Cross multiply
    551,020.20x = 760,484.64 × 306,060
  4. Step 4: Simplify right side
    551,020.20x = 232,753,928,918.40
  5. Step 5: Solve for x
    x = 232,753,928,918.40/551,020.20
  6. Step 6: Final answer
    x = 422,405.44

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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.