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Finding the Fourth Proportional to 316,128.62, 436,254.71 and 172,889.69

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Solution

The fourth proportional to 316,128.62, 436,254.71 and 172,889.69 is: 238,586.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,128.62 : 436,254.71 = 172,889.69 : x
  2. Step 2: Convert to fraction form
    316,128.62/436,254.71 = 172,889.69/x
  3. Step 3: Cross multiply
    316,128.62x = 436,254.71 × 172,889.69
  4. Step 4: Simplify right side
    316,128.62x = 75,423,941,953.66
  5. Step 5: Solve for x
    x = 75,423,941,953.66/316,128.62
  6. Step 6: Final answer
    x = 238,586.25

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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.