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Finding the Fourth Proportional to 555,377.46, 766,420.92 and 300,728.65

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Solution

The fourth proportional to 555,377.46, 766,420.92 and 300,728.65 is: 415,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,377.46 : 766,420.92 = 300,728.65 : x
  2. Step 2: Convert to fraction form
    555,377.46/766,420.92 = 300,728.65/x
  3. Step 3: Cross multiply
    555,377.46x = 766,420.92 × 300,728.65
  4. Step 4: Simplify right side
    555,377.46x = 230,484,728,124.35
  5. Step 5: Solve for x
    x = 230,484,728,124.35/555,377.46
  6. Step 6: Final answer
    x = 415,005.55

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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.