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Finding the Fourth Proportional to 491,312.40, 678,004.32 and 276,452.64

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Solution

The fourth proportional to 491,312.40, 678,004.32 and 276,452.64 is: 381,500.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,312.40 : 678,004.32 = 276,452.64 : x
  2. Step 2: Convert to fraction form
    491,312.40/678,004.32 = 276,452.64/x
  3. Step 3: Cross multiply
    491,312.40x = 678,004.32 × 276,452.64
  4. Step 4: Simplify right side
    491,312.40x = 187,436,084,195.41
  5. Step 5: Solve for x
    x = 187,436,084,195.41/491,312.40
  6. Step 6: Final answer
    x = 381,500.82

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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.