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Finding the Fourth Proportional to 459,941.80, 689,912.70 and 425,727.40

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Solution

The fourth proportional to 459,941.80, 689,912.70 and 425,727.40 is: 638,591.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,941.80 : 689,912.70 = 425,727.40 : x
  2. Step 2: Convert to fraction form
    459,941.80/689,912.70 = 425,727.40/x
  3. Step 3: Cross multiply
    459,941.80x = 689,912.70 × 425,727.40
  4. Step 4: Simplify right side
    459,941.80x = 293,714,739,997.98
  5. Step 5: Solve for x
    x = 293,714,739,997.98/459,941.80
  6. Step 6: Final answer
    x = 638,591.10

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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.