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Finding the Fourth Proportional to 353,044.80, 487,313.28 and 225,720.90

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Solution

The fourth proportional to 353,044.80, 487,313.28 and 225,720.90 is: 311,566.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,044.80 : 487,313.28 = 225,720.90 : x
  2. Step 2: Convert to fraction form
    353,044.80/487,313.28 = 225,720.90/x
  3. Step 3: Cross multiply
    353,044.80x = 487,313.28 × 225,720.90
  4. Step 4: Simplify right side
    353,044.80x = 109,996,792,143.55
  5. Step 5: Solve for x
    x = 109,996,792,143.55/353,044.80
  6. Step 6: Final answer
    x = 311,566.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.