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Finding the Fourth Proportional to 305,497.80, 458,465.40 and 128,132.10

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Solution

The fourth proportional to 305,497.80, 458,465.40 and 128,132.10 is: 192,289.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,497.80 : 458,465.40 = 128,132.10 : x
  2. Step 2: Convert to fraction form
    305,497.80/458,465.40 = 128,132.10/x
  3. Step 3: Cross multiply
    305,497.80x = 458,465.40 × 128,132.10
  4. Step 4: Simplify right side
    305,497.80x = 58,744,134,479.34
  5. Step 5: Solve for x
    x = 58,744,134,479.34/305,497.80
  6. Step 6: Final answer
    x = 192,289.88

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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.