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Finding the Fourth Proportional to 565,801.28, 780,790.19 and 311,152.47

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Solution

The fourth proportional to 565,801.28, 780,790.19 and 311,152.47 is: 429,381.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,801.28 : 780,790.19 = 311,152.47 : x
  2. Step 2: Convert to fraction form
    565,801.28/780,790.19 = 311,152.47/x
  3. Step 3: Cross multiply
    565,801.28x = 780,790.19 × 311,152.47
  4. Step 4: Simplify right side
    565,801.28x = 242,944,796,170.27
  5. Step 5: Solve for x
    x = 242,944,796,170.27/565,801.28
  6. Step 6: Final answer
    x = 429,381.84

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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.