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Finding the Fourth Proportional to 565,391.89, 780,207.81 and 310,743.28

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Solution

The fourth proportional to 565,391.89, 780,207.81 and 310,743.28 is: 428,807.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,391.89 : 780,207.81 = 310,743.28 : x
  2. Step 2: Convert to fraction form
    565,391.89/780,207.81 = 310,743.28/x
  3. Step 3: Cross multiply
    565,391.89x = 780,207.81 × 310,743.28
  4. Step 4: Simplify right side
    565,391.89x = 242,444,333,961.02
  5. Step 5: Solve for x
    x = 242,444,333,961.02/565,391.89
  6. Step 6: Final answer
    x = 428,807.59

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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.