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Finding the Fourth Proportional to 690,951.80, 953,491.02 and 422,679.80

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Solution

The fourth proportional to 690,951.80, 953,491.02 and 422,679.80 is: 583,284.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,951.80 : 953,491.02 = 422,679.80 : x
  2. Step 2: Convert to fraction form
    690,951.80/953,491.02 = 422,679.80/x
  3. Step 3: Cross multiply
    690,951.80x = 953,491.02 × 422,679.80
  4. Step 4: Simplify right side
    690,951.80x = 403,021,393,635.40
  5. Step 5: Solve for x
    x = 403,021,393,635.40/690,951.80
  6. Step 6: Final answer
    x = 583,284.38

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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.