Home / 868,956.20-1,303,434.30-420,021.80

Finding the Fourth Proportional to 868,956.20, 1,303,434.30 and 420,021.80

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Solution

The fourth proportional to 868,956.20, 1,303,434.30 and 420,021.80 is: 630,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,956.20 : 1,303,434.30 = 420,021.80 : x
  2. Step 2: Convert to fraction form
    868,956.20/1,303,434.30 = 420,021.80/x
  3. Step 3: Cross multiply
    868,956.20x = 1,303,434.30 × 420,021.80
  4. Step 4: Simplify right side
    868,956.20x = 547,470,820,867.74
  5. Step 5: Solve for x
    x = 547,470,820,867.74/868,956.20
  6. Step 6: Final answer
    x = 630,032.70

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Double scale
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Similar ratio
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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.