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Finding the Fourth Proportional to 565,805.20, 780,795.58 and 311,156.38

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Solution

The fourth proportional to 565,805.20, 780,795.58 and 311,156.38 is: 429,387.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,805.20 : 780,795.58 = 311,156.38 : x
  2. Step 2: Convert to fraction form
    565,805.20/780,795.58 = 311,156.38/x
  3. Step 3: Cross multiply
    565,805.20x = 780,795.58 × 311,156.38
  4. Step 4: Simplify right side
    565,805.20x = 242,949,526,192.80
  5. Step 5: Solve for x
    x = 242,949,526,192.80/565,805.20
  6. Step 6: Final answer
    x = 429,387.23

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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.