Home / 280,226.66-420,328.08-130,415.31

Finding the Fourth Proportional to 280,226.66, 420,328.08 and 130,415.31

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Solution

The fourth proportional to 280,226.66, 420,328.08 and 130,415.31 is: 195,617.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,226.66 : 420,328.08 = 130,415.31 : x
  2. Step 2: Convert to fraction form
    280,226.66/420,328.08 = 130,415.31/x
  3. Step 3: Cross multiply
    280,226.66x = 420,328.08 × 130,415.31
  4. Step 4: Simplify right side
    280,226.66x = 54,817,216,854.90
  5. Step 5: Solve for x
    x = 54,817,216,854.90/280,226.66
  6. Step 6: Final answer
    x = 195,617.43

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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.