Home / 688,091.20-1,032,136.80-520,129.60

Finding the Fourth Proportional to 688,091.20, 1,032,136.80 and 520,129.60

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Solution

The fourth proportional to 688,091.20, 1,032,136.80 and 520,129.60 is: 780,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,091.20 : 1,032,136.80 = 520,129.60 : x
  2. Step 2: Convert to fraction form
    688,091.20/1,032,136.80 = 520,129.60/x
  3. Step 3: Cross multiply
    688,091.20x = 1,032,136.80 × 520,129.60
  4. Step 4: Simplify right side
    688,091.20x = 536,844,900,929.28
  5. Step 5: Solve for x
    x = 536,844,900,929.28/688,091.20
  6. Step 6: Final answer
    x = 780,194.40

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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.