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Finding the Fourth Proportional to 315,586.20, 472,457.70 and 282,408.60

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Solution

The fourth proportional to 315,586.20, 472,457.70 and 282,408.60 is: 422,788.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,586.20 : 472,457.70 = 282,408.60 : x
  2. Step 2: Convert to fraction form
    315,586.20/472,457.70 = 282,408.60/x
  3. Step 3: Cross multiply
    315,586.20x = 472,457.70 × 282,408.60
  4. Step 4: Simplify right side
    315,586.20x = 133,426,117,616.22
  5. Step 5: Solve for x
    x = 133,426,117,616.22/315,586.20
  6. Step 6: Final answer
    x = 422,788.19

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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.