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Finding the Fourth Proportional to 555,520.32, 766,620 and 300,870.72

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Solution

The fourth proportional to 555,520.32, 766,620 and 300,870.72 is: 415,202.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,520.32 : 766,620 = 300,870.72 : x
  2. Step 2: Convert to fraction form
    555,520.32/766,620 = 300,870.72/x
  3. Step 3: Cross multiply
    555,520.32x = 766,620 × 300,870.72
  4. Step 4: Simplify right side
    555,520.32x = 230,653,511,366.40
  5. Step 5: Solve for x
    x = 230,653,511,366.40/555,520.32
  6. Step 6: Final answer
    x = 415,202.65

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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.