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Finding the Fourth Proportional to 210,688.80, 315,265.20 and 155,392.80

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Solution

The fourth proportional to 210,688.80, 315,265.20 and 155,392.80 is: 232,522.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,688.80 : 315,265.20 = 155,392.80 : x
  2. Step 2: Convert to fraction form
    210,688.80/315,265.20 = 155,392.80/x
  3. Step 3: Cross multiply
    210,688.80x = 315,265.20 × 155,392.80
  4. Step 4: Simplify right side
    210,688.80x = 48,989,942,170.56
  5. Step 5: Solve for x
    x = 48,989,942,170.56/210,688.80
  6. Step 6: Final answer
    x = 232,522.76

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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.