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Finding the Fourth Proportional to 565,478.91, 780,321.08 and 310,846.59

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Solution

The fourth proportional to 565,478.91, 780,321.08 and 310,846.59 is: 428,946.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,478.91 : 780,321.08 = 310,846.59 : x
  2. Step 2: Convert to fraction form
    565,478.91/780,321.08 = 310,846.59/x
  3. Step 3: Cross multiply
    565,478.91x = 780,321.08 × 310,846.59
  4. Step 4: Simplify right side
    565,478.91x = 242,560,145,268.88
  5. Step 5: Solve for x
    x = 242,560,145,268.88/565,478.91
  6. Step 6: Final answer
    x = 428,946.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.