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Finding the Fourth Proportional to 313,145.60, 423,057.60 and 313,145.60

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Solution

The fourth proportional to 313,145.60, 423,057.60 and 313,145.60 is: 423,057.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,145.60 : 423,057.60 = 313,145.60 : x
  2. Step 2: Convert to fraction form
    313,145.60/423,057.60 = 313,145.60/x
  3. Step 3: Cross multiply
    313,145.60x = 423,057.60 × 313,145.60
  4. Step 4: Simplify right side
    313,145.60x = 132,478,625,986.56
  5. Step 5: Solve for x
    x = 132,478,625,986.56/313,145.60
  6. Step 6: Final answer
    x = 423,057.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.