Home / 280,291.32-420,508.16-80,607.44

Finding the Fourth Proportional to 280,291.32, 420,508.16 and 80,607.44

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Solution

The fourth proportional to 280,291.32, 420,508.16 and 80,607.44 is: 120,931.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,291.32 : 420,508.16 = 80,607.44 : x
  2. Step 2: Convert to fraction form
    280,291.32/420,508.16 = 80,607.44/x
  3. Step 3: Cross multiply
    280,291.32x = 420,508.16 × 80,607.44
  4. Step 4: Simplify right side
    280,291.32x = 33,896,086,276.71
  5. Step 5: Solve for x
    x = 33,896,086,276.71/280,291.32
  6. Step 6: Final answer
    x = 120,931.63

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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.