Home / 420,535.20-630,903.36-140,054.88

Finding the Fourth Proportional to 420,535.20, 630,903.36 and 140,054.88

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Solution

The fourth proportional to 420,535.20, 630,903.36 and 140,054.88 is: 210,115.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,535.20 : 630,903.36 = 140,054.88 : x
  2. Step 2: Convert to fraction form
    420,535.20/630,903.36 = 140,054.88/x
  3. Step 3: Cross multiply
    420,535.20x = 630,903.36 × 140,054.88
  4. Step 4: Simplify right side
    420,535.20x = 88,361,094,376.40
  5. Step 5: Solve for x
    x = 88,361,094,376.40/420,535.20
  6. Step 6: Final answer
    x = 210,115.81

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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.