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Finding the Fourth Proportional to 315,085.80, 472,628.70 and 275,719.80

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Solution

The fourth proportional to 315,085.80, 472,628.70 and 275,719.80 is: 413,579.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,085.80 : 472,628.70 = 275,719.80 : x
  2. Step 2: Convert to fraction form
    315,085.80/472,628.70 = 275,719.80/x
  3. Step 3: Cross multiply
    315,085.80x = 472,628.70 × 275,719.80
  4. Step 4: Simplify right side
    315,085.80x = 130,313,090,638.26
  5. Step 5: Solve for x
    x = 130,313,090,638.26/315,085.80
  6. Step 6: Final answer
    x = 413,579.70

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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.