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Finding the Fourth Proportional to 807,878.16, 1,114,874.15 and 485,772.75

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Solution

The fourth proportional to 807,878.16, 1,114,874.15 and 485,772.75 is: 670,367.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,878.16 : 1,114,874.15 = 485,772.75 : x
  2. Step 2: Convert to fraction form
    807,878.16/1,114,874.15 = 485,772.75/x
  3. Step 3: Cross multiply
    807,878.16x = 1,114,874.15 × 485,772.75
  4. Step 4: Simplify right side
    807,878.16x = 541,575,479,320.55
  5. Step 5: Solve for x
    x = 541,575,479,320.55/807,878.16
  6. Step 6: Final answer
    x = 670,367.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.