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Finding the Fourth Proportional to 316,615.10, 474,519.45 and 129,415.10

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Solution

The fourth proportional to 316,615.10, 474,519.45 and 129,415.10 is: 193,957.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,615.10 : 474,519.45 = 129,415.10 : x
  2. Step 2: Convert to fraction form
    316,615.10/474,519.45 = 129,415.10/x
  3. Step 3: Cross multiply
    316,615.10x = 474,519.45 × 129,415.10
  4. Step 4: Simplify right side
    316,615.10x = 61,409,982,073.70
  5. Step 5: Solve for x
    x = 61,409,982,073.70/316,615.10
  6. Step 6: Final answer
    x = 193,957.84

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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.