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Finding the Fourth Proportional to 425,339.40, 638,009.10 and 129,851.40

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Solution

The fourth proportional to 425,339.40, 638,009.10 and 129,851.40 is: 194,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,339.40 : 638,009.10 = 129,851.40 : x
  2. Step 2: Convert to fraction form
    425,339.40/638,009.10 = 129,851.40/x
  3. Step 3: Cross multiply
    425,339.40x = 638,009.10 × 129,851.40
  4. Step 4: Simplify right side
    425,339.40x = 82,846,374,847.74
  5. Step 5: Solve for x
    x = 82,846,374,847.74/425,339.40
  6. Step 6: Final answer
    x = 194,777.10

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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.