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Finding the Fourth Proportional to 316,291.78, 436,439.55 and 188,940.34

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Solution

The fourth proportional to 316,291.78, 436,439.55 and 188,940.34 is: 260,711.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,291.78 : 436,439.55 = 188,940.34 : x
  2. Step 2: Convert to fraction form
    316,291.78/436,439.55 = 188,940.34/x
  3. Step 3: Cross multiply
    316,291.78x = 436,439.55 × 188,940.34
  4. Step 4: Simplify right side
    316,291.78x = 82,461,036,966.45
  5. Step 5: Solve for x
    x = 82,461,036,966.45/316,291.78
  6. Step 6: Final answer
    x = 260,711.92

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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.