Home / 491,315.55-678,011.07-276,451.32

Finding the Fourth Proportional to 491,315.55, 678,011.07 and 276,451.32

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Solution

The fourth proportional to 491,315.55, 678,011.07 and 276,451.32 is: 381,500.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,315.55 : 678,011.07 = 276,451.32 : x
  2. Step 2: Convert to fraction form
    491,315.55/678,011.07 = 276,451.32/x
  3. Step 3: Cross multiply
    491,315.55x = 678,011.07 × 276,451.32
  4. Step 4: Simplify right side
    491,315.55x = 187,437,055,276.11
  5. Step 5: Solve for x
    x = 187,437,055,276.11/491,315.55
  6. Step 6: Final answer
    x = 381,500.35

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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.