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Finding the Fourth Proportional to 519,145.20, 778,717.80 and 306,568.80

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Solution

The fourth proportional to 519,145.20, 778,717.80 and 306,568.80 is: 459,853.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,145.20 : 778,717.80 = 306,568.80 : x
  2. Step 2: Convert to fraction form
    519,145.20/778,717.80 = 306,568.80/x
  3. Step 3: Cross multiply
    519,145.20x = 778,717.80 × 306,568.80
  4. Step 4: Simplify right side
    519,145.20x = 238,730,581,484.64
  5. Step 5: Solve for x
    x = 238,730,581,484.64/519,145.20
  6. Step 6: Final answer
    x = 459,853.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.