Home / 813,455.80-1,220,130.14-280,984.44

Finding the Fourth Proportional to 813,455.80, 1,220,130.14 and 280,984.44

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Solution

The fourth proportional to 813,455.80, 1,220,130.14 and 280,984.44 is: 421,458.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,455.80 : 1,220,130.14 = 280,984.44 : x
  2. Step 2: Convert to fraction form
    813,455.80/1,220,130.14 = 280,984.44/x
  3. Step 3: Cross multiply
    813,455.80x = 1,220,130.14 × 280,984.44
  4. Step 4: Simplify right side
    813,455.80x = 342,837,584,115.02
  5. Step 5: Solve for x
    x = 342,837,584,115.02/813,455.80
  6. Step 6: Final answer
    x = 421,458.16

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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.