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Finding the Fourth Proportional to 459,080.10, 688,620.15 and 309,780.90

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Solution

The fourth proportional to 459,080.10, 688,620.15 and 309,780.90 is: 464,671.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,080.10 : 688,620.15 = 309,780.90 : x
  2. Step 2: Convert to fraction form
    459,080.10/688,620.15 = 309,780.90/x
  3. Step 3: Cross multiply
    459,080.10x = 688,620.15 × 309,780.90
  4. Step 4: Simplify right side
    459,080.10x = 213,321,369,825.14
  5. Step 5: Solve for x
    x = 213,321,369,825.14/459,080.10
  6. Step 6: Final answer
    x = 464,671.35

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Similar ratio
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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.