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Finding the Fourth Proportional to 500,408.40, 690,560.64 and 270,963.36

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Solution

The fourth proportional to 500,408.40, 690,560.64 and 270,963.36 is: 373,927.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,408.40 : 690,560.64 = 270,963.36 : x
  2. Step 2: Convert to fraction form
    500,408.40/690,560.64 = 270,963.36/x
  3. Step 3: Cross multiply
    500,408.40x = 690,560.64 × 270,963.36
  4. Step 4: Simplify right side
    500,408.40x = 187,116,631,298.15
  5. Step 5: Solve for x
    x = 187,116,631,298.15/500,408.40
  6. Step 6: Final answer
    x = 373,927.84

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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.