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Finding the Fourth Proportional to 520,087.60, 780,131.40 and 306,636.40

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Solution

The fourth proportional to 520,087.60, 780,131.40 and 306,636.40 is: 459,954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,087.60 : 780,131.40 = 306,636.40 : x
  2. Step 2: Convert to fraction form
    520,087.60/780,131.40 = 306,636.40/x
  3. Step 3: Cross multiply
    520,087.60x = 780,131.40 × 306,636.40
  4. Step 4: Simplify right side
    520,087.60x = 239,216,684,022.96
  5. Step 5: Solve for x
    x = 239,216,684,022.96/520,087.60
  6. Step 6: Final answer
    x = 459,954.60

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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.