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Finding the Fourth Proportional to 458,408.63, 688,332.66 and 388,251.05

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Solution

The fourth proportional to 458,408.63, 688,332.66 and 388,251.05 is: 582,986.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,408.63 : 688,332.66 = 388,251.05 : x
  2. Step 2: Convert to fraction form
    458,408.63/688,332.66 = 388,251.05/x
  3. Step 3: Cross multiply
    458,408.63x = 688,332.66 × 388,251.05
  4. Step 4: Simplify right side
    458,408.63x = 267,245,874,552.63
  5. Step 5: Solve for x
    x = 267,245,874,552.63/458,408.63
  6. Step 6: Final answer
    x = 582,986.14

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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.