Home / 771,685.20-1,155,972.60-519,742.80

Finding the Fourth Proportional to 771,685.20, 1,155,972.60 and 519,742.80

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Solution

The fourth proportional to 771,685.20, 1,155,972.60 and 519,742.80 is: 778,566.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,685.20 : 1,155,972.60 = 519,742.80 : x
  2. Step 2: Convert to fraction form
    771,685.20/1,155,972.60 = 519,742.80/x
  3. Step 3: Cross multiply
    771,685.20x = 1,155,972.60 × 519,742.80
  4. Step 4: Simplify right side
    771,685.20x = 600,808,435,847.28
  5. Step 5: Solve for x
    x = 600,808,435,847.28/771,685.20
  6. Step 6: Final answer
    x = 778,566.75

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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.