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Finding the Fourth Proportional to 555,424.96, 766,488.78 and 300,776.34

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Solution

The fourth proportional to 555,424.96, 766,488.78 and 300,776.34 is: 415,072.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,424.96 : 766,488.78 = 300,776.34 : x
  2. Step 2: Convert to fraction form
    555,424.96/766,488.78 = 300,776.34/x
  3. Step 3: Cross multiply
    555,424.96x = 766,488.78 × 300,776.34
  4. Step 4: Simplify right side
    555,424.96x = 230,541,689,899.47
  5. Step 5: Solve for x
    x = 230,541,689,899.47/555,424.96
  6. Step 6: Final answer
    x = 415,072.61

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1.5x scale

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.