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Finding the Fourth Proportional to 315,620.70, 473,200.65 and 128,535.90

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Solution

The fourth proportional to 315,620.70, 473,200.65 and 128,535.90 is: 192,710.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,620.70 : 473,200.65 = 128,535.90 : x
  2. Step 2: Convert to fraction form
    315,620.70/473,200.65 = 128,535.90/x
  3. Step 3: Cross multiply
    315,620.70x = 473,200.65 × 128,535.90
  4. Step 4: Simplify right side
    315,620.70x = 60,823,271,428.34
  5. Step 5: Solve for x
    x = 60,823,271,428.34/315,620.70
  6. Step 6: Final answer
    x = 192,710.02

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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.