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Finding the Fourth Proportional to 664,111.80, 996,167.70 and 427,721.40

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Solution

The fourth proportional to 664,111.80, 996,167.70 and 427,721.40 is: 641,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,111.80 : 996,167.70 = 427,721.40 : x
  2. Step 2: Convert to fraction form
    664,111.80/996,167.70 = 427,721.40/x
  3. Step 3: Cross multiply
    664,111.80x = 996,167.70 × 427,721.40
  4. Step 4: Simplify right side
    664,111.80x = 426,082,243,278.78
  5. Step 5: Solve for x
    x = 426,082,243,278.78/664,111.80
  6. Step 6: Final answer
    x = 641,582.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.