Home / 459,460.40-689,190.60-143,949.20

Finding the Fourth Proportional to 459,460.40, 689,190.60 and 143,949.20

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Solution

The fourth proportional to 459,460.40, 689,190.60 and 143,949.20 is: 215,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,460.40 : 689,190.60 = 143,949.20 : x
  2. Step 2: Convert to fraction form
    459,460.40/689,190.60 = 143,949.20/x
  3. Step 3: Cross multiply
    459,460.40x = 689,190.60 × 143,949.20
  4. Step 4: Simplify right side
    459,460.40x = 99,208,435,517.52
  5. Step 5: Solve for x
    x = 99,208,435,517.52/459,460.40
  6. Step 6: Final answer
    x = 215,923.80

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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.