Home / 818,720.70-1,228,081.05-458,521.80

Finding the Fourth Proportional to 818,720.70, 1,228,081.05 and 458,521.80

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Solution

The fourth proportional to 818,720.70, 1,228,081.05 and 458,521.80 is: 687,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,720.70 : 1,228,081.05 = 458,521.80 : x
  2. Step 2: Convert to fraction form
    818,720.70/1,228,081.05 = 458,521.80/x
  3. Step 3: Cross multiply
    818,720.70x = 1,228,081.05 × 458,521.80
  4. Step 4: Simplify right side
    818,720.70x = 563,101,933,591.89
  5. Step 5: Solve for x
    x = 563,101,933,591.89/818,720.70
  6. Step 6: Final answer
    x = 687,782.70

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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.