Home / 579,423.20-869,134.80-486,111.20

Finding the Fourth Proportional to 579,423.20, 869,134.80 and 486,111.20

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Solution

The fourth proportional to 579,423.20, 869,134.80 and 486,111.20 is: 729,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,423.20 : 869,134.80 = 486,111.20 : x
  2. Step 2: Convert to fraction form
    579,423.20/869,134.80 = 486,111.20/x
  3. Step 3: Cross multiply
    579,423.20x = 869,134.80 × 486,111.20
  4. Step 4: Simplify right side
    579,423.20x = 422,496,160,589.76
  5. Step 5: Solve for x
    x = 422,496,160,589.76/579,423.20
  6. Step 6: Final answer
    x = 729,166.80

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Half scale
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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.