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Finding the Fourth Proportional to 315,797.20, 473,465.40 and 128,712.40

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Solution

The fourth proportional to 315,797.20, 473,465.40 and 128,712.40 is: 192,974.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,797.20 : 473,465.40 = 128,712.40 : x
  2. Step 2: Convert to fraction form
    315,797.20/473,465.40 = 128,712.40/x
  3. Step 3: Cross multiply
    315,797.20x = 473,465.40 × 128,712.40
  4. Step 4: Simplify right side
    315,797.20x = 60,940,867,950.96
  5. Step 5: Solve for x
    x = 60,940,867,950.96/315,797.20
  6. Step 6: Final answer
    x = 192,974.69

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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.