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Finding the Fourth Proportional to 459,003.80, 688,505.70 and 425,826.20

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Solution

The fourth proportional to 459,003.80, 688,505.70 and 425,826.20 is: 638,739.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,003.80 : 688,505.70 = 425,826.20 : x
  2. Step 2: Convert to fraction form
    459,003.80/688,505.70 = 425,826.20/x
  3. Step 3: Cross multiply
    459,003.80x = 688,505.70 × 425,826.20
  4. Step 4: Simplify right side
    459,003.80x = 293,183,765,909.34
  5. Step 5: Solve for x
    x = 293,183,765,909.34/459,003.80
  6. Step 6: Final answer
    x = 638,739.30

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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.