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Finding the Fourth Proportional to 313,928.40, 470,892.60 and 289,966.80

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Solution

The fourth proportional to 313,928.40, 470,892.60 and 289,966.80 is: 434,950.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,928.40 : 470,892.60 = 289,966.80 : x
  2. Step 2: Convert to fraction form
    313,928.40/470,892.60 = 289,966.80/x
  3. Step 3: Cross multiply
    313,928.40x = 470,892.60 × 289,966.80
  4. Step 4: Simplify right side
    313,928.40x = 136,543,220,365.68
  5. Step 5: Solve for x
    x = 136,543,220,365.68/313,928.40
  6. Step 6: Final answer
    x = 434,950.20

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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.