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Finding the Fourth Proportional to 296,945.40, 445,475.70 and 128,465.40

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Solution

The fourth proportional to 296,945.40, 445,475.70 and 128,465.40 is: 192,723.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,945.40 : 445,475.70 = 128,465.40 : x
  2. Step 2: Convert to fraction form
    296,945.40/445,475.70 = 128,465.40/x
  3. Step 3: Cross multiply
    296,945.40x = 445,475.70 × 128,465.40
  4. Step 4: Simplify right side
    296,945.40x = 57,228,213,990.78
  5. Step 5: Solve for x
    x = 57,228,213,990.78/296,945.40
  6. Step 6: Final answer
    x = 192,723.02

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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.