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Finding the Fourth Proportional to 217,046.40, 325,569.60 and 128,254.20

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Solution

The fourth proportional to 217,046.40, 325,569.60 and 128,254.20 is: 192,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,046.40 : 325,569.60 = 128,254.20 : x
  2. Step 2: Convert to fraction form
    217,046.40/325,569.60 = 128,254.20/x
  3. Step 3: Cross multiply
    217,046.40x = 325,569.60 × 128,254.20
  4. Step 4: Simplify right side
    217,046.40x = 41,755,668,592.32
  5. Step 5: Solve for x
    x = 41,755,668,592.32/217,046.40
  6. Step 6: Final answer
    x = 192,381.30

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1.5x scale

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.