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Finding the Fourth Proportional to 479,620.10, 719,430.15 and 459,143.30

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Solution

The fourth proportional to 479,620.10, 719,430.15 and 459,143.30 is: 688,714.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,620.10 : 719,430.15 = 459,143.30 : x
  2. Step 2: Convert to fraction form
    479,620.10/719,430.15 = 459,143.30/x
  3. Step 3: Cross multiply
    479,620.10x = 719,430.15 × 459,143.30
  4. Step 4: Simplify right side
    479,620.10x = 330,321,533,190.50
  5. Step 5: Solve for x
    x = 330,321,533,190.50/479,620.10
  6. Step 6: Final answer
    x = 688,714.95

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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.