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Finding the Fourth Proportional to 354,663.40, 532,043.70 and 129,969.40

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Solution

The fourth proportional to 354,663.40, 532,043.70 and 129,969.40 is: 194,971.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,663.40 : 532,043.70 = 129,969.40 : x
  2. Step 2: Convert to fraction form
    354,663.40/532,043.70 = 129,969.40/x
  3. Step 3: Cross multiply
    354,663.40x = 532,043.70 × 129,969.40
  4. Step 4: Simplify right side
    354,663.40x = 69,149,400,462.78
  5. Step 5: Solve for x
    x = 69,149,400,462.78/354,663.40
  6. Step 6: Final answer
    x = 194,971.91

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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.