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Finding the Fourth Proportional to 459,122.40, 688,683.60 and 317,404.80

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Solution

The fourth proportional to 459,122.40, 688,683.60 and 317,404.80 is: 476,107.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,122.40 : 688,683.60 = 317,404.80 : x
  2. Step 2: Convert to fraction form
    459,122.40/688,683.60 = 317,404.80/x
  3. Step 3: Cross multiply
    459,122.40x = 688,683.60 × 317,404.80
  4. Step 4: Simplify right side
    459,122.40x = 218,591,480,321.28
  5. Step 5: Solve for x
    x = 218,591,480,321.28/459,122.40
  6. Step 6: Final answer
    x = 476,107.20

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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.