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Finding the Fourth Proportional to 459,480.88, 689,220.87 and 143,962.39

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Solution

The fourth proportional to 459,480.88, 689,220.87 and 143,962.39 is: 215,943.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,480.88 : 689,220.87 = 143,962.39 : x
  2. Step 2: Convert to fraction form
    459,480.88/689,220.87 = 143,962.39/x
  3. Step 3: Cross multiply
    459,480.88x = 689,220.87 × 143,962.39
  4. Step 4: Simplify right side
    459,480.88x = 99,221,883,683.08
  5. Step 5: Solve for x
    x = 99,221,883,683.08/459,480.88
  6. Step 6: Final answer
    x = 215,943.44

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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.