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Finding the Fourth Proportional to 690,399.80, 952,652.58 and 403,865.72

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Solution

The fourth proportional to 690,399.80, 952,652.58 and 403,865.72 is: 557,276.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,399.80 : 952,652.58 = 403,865.72 : x
  2. Step 2: Convert to fraction form
    690,399.80/952,652.58 = 403,865.72/x
  3. Step 3: Cross multiply
    690,399.80x = 952,652.58 × 403,865.72
  4. Step 4: Simplify right side
    690,399.80x = 384,743,720,131.56
  5. Step 5: Solve for x
    x = 384,743,720,131.56/690,399.80
  6. Step 6: Final answer
    x = 557,276.70

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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.