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Finding the Fourth Proportional to 565,516.87, 780,393.51 and 310,866.23

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Solution

The fourth proportional to 565,516.87, 780,393.51 and 310,866.23 is: 428,984.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,516.87 : 780,393.51 = 310,866.23 : x
  2. Step 2: Convert to fraction form
    565,516.87/780,393.51 = 310,866.23/x
  3. Step 3: Cross multiply
    565,516.87x = 780,393.51 × 310,866.23
  4. Step 4: Simplify right side
    565,516.87x = 242,597,990,321.15
  5. Step 5: Solve for x
    x = 242,597,990,321.15/565,516.87
  6. Step 6: Final answer
    x = 428,984.53

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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.