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Finding the Fourth Proportional to 229,394.40, 316,564.26 and 128,792.40

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Solution

The fourth proportional to 229,394.40, 316,564.26 and 128,792.40 is: 177,733.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,394.40 : 316,564.26 = 128,792.40 : x
  2. Step 2: Convert to fraction form
    229,394.40/316,564.26 = 128,792.40/x
  3. Step 3: Cross multiply
    229,394.40x = 316,564.26 × 128,792.40
  4. Step 4: Simplify right side
    229,394.40x = 40,771,070,799.62
  5. Step 5: Solve for x
    x = 40,771,070,799.62/229,394.40
  6. Step 6: Final answer
    x = 177,733.51

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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.