Home / 920,613.20-1,380,919.80-289,720.40

Finding the Fourth Proportional to 920,613.20, 1,380,919.80 and 289,720.40

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Solution

The fourth proportional to 920,613.20, 1,380,919.80 and 289,720.40 is: 434,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,613.20 : 1,380,919.80 = 289,720.40 : x
  2. Step 2: Convert to fraction form
    920,613.20/1,380,919.80 = 289,720.40/x
  3. Step 3: Cross multiply
    920,613.20x = 1,380,919.80 × 289,720.40
  4. Step 4: Simplify right side
    920,613.20x = 400,080,636,823.92
  5. Step 5: Solve for x
    x = 400,080,636,823.92/920,613.20
  6. Step 6: Final answer
    x = 434,580.60

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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.