Home / 428,899.11-643,590.59-425,512.23

Finding the Fourth Proportional to 428,899.11, 643,590.59 and 425,512.23

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Solution

The fourth proportional to 428,899.11, 643,590.59 and 425,512.23 is: 638,508.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,899.11 : 643,590.59 = 425,512.23 : x
  2. Step 2: Convert to fraction form
    428,899.11/643,590.59 = 425,512.23/x
  3. Step 3: Cross multiply
    428,899.11x = 643,590.59 × 425,512.23
  4. Step 4: Simplify right side
    428,899.11x = 273,855,665,030.36
  5. Step 5: Solve for x
    x = 273,855,665,030.36/428,899.11
  6. Step 6: Final answer
    x = 638,508.35

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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.