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Finding the Fourth Proportional to 318,904.60, 479,069.70 and 266,416.60

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Solution

The fourth proportional to 318,904.60, 479,069.70 and 266,416.60 is: 400,220.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,904.60 : 479,069.70 = 266,416.60 : x
  2. Step 2: Convert to fraction form
    318,904.60/479,069.70 = 266,416.60/x
  3. Step 3: Cross multiply
    318,904.60x = 479,069.70 × 266,416.60
  4. Step 4: Simplify right side
    318,904.60x = 127,632,120,637.02
  5. Step 5: Solve for x
    x = 127,632,120,637.02/318,904.60
  6. Step 6: Final answer
    x = 400,220.38

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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.