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Finding the Fourth Proportional to 459,245.68, 688,743.60 and 290,512.72

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Solution

The fourth proportional to 459,245.68, 688,743.60 and 290,512.72 is: 435,690.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,245.68 : 688,743.60 = 290,512.72 : x
  2. Step 2: Convert to fraction form
    459,245.68/688,743.60 = 290,512.72/x
  3. Step 3: Cross multiply
    459,245.68x = 688,743.60 × 290,512.72
  4. Step 4: Simplify right side
    459,245.68x = 200,088,776,618.59
  5. Step 5: Solve for x
    x = 200,088,776,618.59/459,245.68
  6. Step 6: Final answer
    x = 435,690.06

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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.