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Finding the Fourth Proportional to 305,786.20, 458,679.30 and 260,515.30

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Solution

The fourth proportional to 305,786.20, 458,679.30 and 260,515.30 is: 390,772.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,786.20 : 458,679.30 = 260,515.30 : x
  2. Step 2: Convert to fraction form
    305,786.20/458,679.30 = 260,515.30/x
  3. Step 3: Cross multiply
    305,786.20x = 458,679.30 × 260,515.30
  4. Step 4: Simplify right side
    305,786.20x = 119,492,975,443.29
  5. Step 5: Solve for x
    x = 119,492,975,443.29/305,786.20
  6. Step 6: Final answer
    x = 390,772.95

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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.